{"kind": "product", "path": "vulns/debian-14/python-urllib3", "name": "python-urllib3", "product": "python-urllib3", "ecosystem": "Debian:14", "items": [{"id": "CVE-2026-97689", "noindex": false, "published": "2026-09-29T15:36:05.963Z", "modified": "2026-09-29T16:23:23.167Z", "cvss": 8.9, "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H", "severity": "high", "epss": 0.00335, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2026-97689", "title": "urllib3: HTTPResponse.stream()/read_chunked() buffers an unbounded chunk-size line into memory", "description": "urllib3 is an HTTP client library for Python. From 1.10.3 until 2.8.0, the HTTPResponse.read_chunked and HTTPResponse.stream methods can allocate unbounded memory because the streaming chunk parser buffers the chunk-size field until newline or EOF without a length bound. The trigger is that a malicious server returns Transfer-Encoding: chunked followed by a very long run of bytes without a newline. The attack mechanism is that a malicious HTTP server sends a very long unterminated chunk-size line. The impact is that unbounded memory allocation can exhaust the client process. This issue is fixed in version 2.8.0.", "references": ["https://github.com/urllib3/urllib3/security/advisories/GHSA-vxq7-64xx-v4gw", "https://github.com/urllib3/urllib3/commit/cd770b059b543be29298ea5c52afb0b1b090f5ed", "https://github.com/urllib3/urllib3/releases/tag/2.8.0"], "fixes": ["2.8.0-1"], "products": [{"name": "python-urllib3", "path": "vulns/debian-14/python-urllib3", "ecosystem": "Debian:14"}]}, {"id": "CVE-2026-97688", "noindex": false, "published": "2026-09-29T15:32:17.622Z", "modified": "2026-09-29T15:42:34.502Z", "cvss": 6.9, "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N", "severity": "medium", "epss": 0.00291, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2026-97688", "title": "urllib3: Chunked Deflate streaming can enter an infinite loop", "description": "urllib3 is an HTTP client library for Python. From 2.6.2 until 2.8.0, HTTPResponse.stream and HTTPResponse.read_chunked can enter an infinite loop because the Deflate decoder retains trailing bytes as unconsumed input after reaching end-of-stream and repeatedly decodes them without progress. The issue occurs when an untrusted server sends a chunked Deflate response whose decoded body exceeds a positive finite chunk size and whose encoded body has trailing bytes, specifically a response with Transfer-Encoding: chunked and Content-Encoding: deflate, content decoding enabled, and the positive finite amt=N streaming chunk size. The attack mechani", "references": ["https://github.com/urllib3/urllib3/security/advisories/GHSA-gh4c-6fx4-qh6g", "https://github.com/urllib3/urllib3/commit/ea2ad7b21a80da3632f80016526a18864586077f", "https://github.com/urllib3/urllib3/releases/tag/2.8.0"], "fixes": ["2.8.0-1"], "products": [{"name": "python-urllib3", "path": "vulns/debian-14/python-urllib3", "ecosystem": "Debian:14"}]}, {"id": "CVE-2026-97687", "noindex": false, "published": "2026-09-29T15:30:27.136Z", "modified": "2026-09-30T20:11:09.721Z", "cvss": 7.6, "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N", "severity": "high", "epss": 0.00206, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2026-97687", "title": "urllib3: HTTPS proxy TLS configuration may be ignored or overridden", "description": "urllib3 is an HTTP client library for Python. From 1.26.0 until 2.8.0, the proxy_ssl_context, proxy_assert_hostname, proxy_assert_fingerprint, ssl_context, cert_reqs, verify_mode, use_forwarding_for_https=True, and CERT_NONE configuration paths fail to remain separated because target-server TLS settings are incorrectly applied to the HTTPS proxy connection. The trigger is that an application uses an HTTPS proxy and configures target-server TLS settings that must remain separate from the proxy TLS handshake, including HTTPS forwarding with target-specific identity or credentials. Applying cert_reqs=CERT_NONE can overwrite proxy_ssl_context.ver", "references": ["https://github.com/urllib3/urllib3/security/advisories/GHSA-8988-9cw3-xx77", "https://github.com/urllib3/urllib3/pull/5093", "https://github.com/urllib3/urllib3/commit/07408cec79d1856d81bb42c74a904a24fdb9e465"], "fixes": ["2.8.0-1"], "products": [{"name": "python-urllib3", "path": "vulns/debian-14/python-urllib3", "ecosystem": "Debian:14"}]}, {"id": "CVE-2026-44431", "noindex": false, "published": "2026-05-13T15:20:24.588Z", "modified": "2026-06-26T11:01:19.373Z", "cvss": 8.2, "cvss_vector": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N", "severity": "high", "epss": 0.00339, "kev": false, "exploits": ["public-poc"], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2026-44431", "title": "urllib3: Sensitive headers forwarded across origins in proxied low-level redirects", "description": "urllib3 is an HTTP client library for Python. From 1.23 to before 2.7.0, cross-origin redirects followed from the low-level API via ProxyManager.connection_from_url().urlopen(..., assert_same_host=False) still forward these sensitive headers. This vulnerability is fixed in 2.7.0.", "references": ["https://github.com/urllib3/urllib3/security/advisories/GHSA-qccp-gfcp-xxvc", "https://lists.debian.org/debian-lts-announce/2026/06/msg00040.html", "https://nvd.nist.gov/vuln/detail/CVE-2026-44431"], "fixes": ["2.7.0-1"], "products": [{"name": "python-urllib3", "path": "vulns/debian-14/python-urllib3", "ecosystem": "Debian:14"}]}, {"id": "CVE-2026-44432", "noindex": false, "published": "2026-05-13T15:17:12.611Z", "modified": "2026-09-10T12:04:48.735Z", "cvss": 8.9, "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H", "severity": "high", "epss": 0.00882, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2026-44432", "title": "urllib3: Decompression-bomb safeguards bypassed in parts of the streaming API", "description": "urllib3 is an HTTP client library for Python. From 2.6.0 to before 2.7.0, urllib3 could decompress the whole response instead of the requested portion (1) during the second HTTPResponse.read(amt=N) call when the response was decompressed using the official Brotli library or (2) when HTTPResponse.drain_conn() was called after the response had been read and decompressed partially (compression algorithm did not matter here). These issues could cause urllib3 to fully decode a small amount of highly compressed data in a single operation. This could result in excessive resource consumption (high CPU usage and massive memory allocation for the decom", "references": ["https://github.com/urllib3/urllib3/security/advisories/GHSA-mf9v-mfxr-j63j", "https://access.redhat.com/security/cve/CVE-2026-44432", "https://bugzilla.redhat.com/show_bug.cgi?id=2477154"], "fixes": ["2.7.0-1"], "products": [{"name": "python-urllib3", "path": "vulns/debian-14/python-urllib3", "ecosystem": "Debian:14"}]}, {"id": "CVE-2026-21441", "noindex": false, "published": "2026-01-07T22:09:01.936Z", "modified": "2026-09-17T12:04:39.688Z", "cvss": 8.9, "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H", "severity": "high", "epss": 0.02922, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2026-21441", "title": "urllib3 vulnerable to decompression-bomb safeguard bypass when following HTTP redirects (streaming API)", "description": "urllib3 is an HTTP client library for Python. urllib3's streaming API is designed for the efficient handling of large HTTP responses by reading the content in chunks, rather than loading the entire response body into memory at once. urllib3 can perform decoding or decompression based on the HTTP `Content-Encoding` header (e.g., `gzip`, `deflate`, `br`, or `zstd`). When using the streaming API, the library decompresses only the necessary bytes, enabling partial content consumption. Starting in version 1.22 and prior to version 2.6.3, for HTTP redirect responses, the library would read the entire response body to drain the connection and decomp", "references": ["https://github.com/urllib3/urllib3/security/advisories/GHSA-38jv-5279-wg99", "https://github.com/urllib3/urllib3/commit/8864ac407bba8607950025e0979c4c69bc7abc7b", "https://lists.debian.org/debian-lts-announce/2026/01/msg00017.html"], "fixes": ["2.5.0-2"], "products": [{"name": "python-urllib3", "path": "vulns/debian-14/python-urllib3", "ecosystem": "Debian:14"}]}, {"id": "CVE-2025-66471", "noindex": false, "published": "2025-12-05T16:06:08.531Z", "modified": "2025-12-05T19:33:14.832Z", "cvss": 8.9, "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H", "severity": "high", "epss": 0.00682, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2025-66471", "title": "urllib3 Streaming API improperly handles highly compressed data", "description": "urllib3 is a user-friendly HTTP client library for Python. Starting in version 1.0 and prior to 2.6.0, the Streaming API improperly handles highly compressed data. urllib3's streaming API is designed for the efficient handling of large HTTP responses by reading the content in chunks, rather than loading the entire response body into memory at once. When streaming a compressed response, urllib3 can perform decoding or decompression based on the HTTP Content-Encoding header (e.g., gzip, deflate, br, or zstd). The library must read compressed data from the network and decompress it until the requested chunk size is met. Any resulting decompresse", "references": ["https://github.com/urllib3/urllib3/security/advisories/GHSA-2xpw-w6gg-jr37", "https://github.com/urllib3/urllib3/commit/c19571de34c47de3a766541b041637ba5f716ed7", "https://nvd.nist.gov/vuln/detail/CVE-2025-66471"], "fixes": ["2.6.3-1"], "products": [{"name": "python-urllib3", "path": "vulns/debian-14/python-urllib3", "ecosystem": "Debian:14"}]}, {"id": "CVE-2025-66418", "noindex": false, "published": "2025-12-05T16:02:15.271Z", "modified": "2025-12-05T18:15:28.505Z", "cvss": 8.9, "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H", "severity": "high", "epss": 0.00682, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2025-66418", "title": "urllib3 allows an unbounded number of links in the decompression chain", "description": "urllib3 is a user-friendly HTTP client library for Python. Starting in version 1.24 and prior to 2.6.0, the number of links in the decompression chain was unbounded allowing a malicious server to insert a virtually unlimited number of compression steps leading to high CPU usage and massive memory allocation for the decompressed data. This vulnerability is fixed in 2.6.0.", "references": ["https://github.com/urllib3/urllib3/security/advisories/GHSA-gm62-xv2j-4w53", "https://github.com/urllib3/urllib3/commit/24d7b67eac89f94e11003424bcf0d8f7b72222a8", "https://nvd.nist.gov/vuln/detail/CVE-2025-66418"], "fixes": ["2.5.0-1.1"], "products": [{"name": "python-urllib3", "path": "vulns/debian-14/python-urllib3", "ecosystem": "Debian:14"}]}, {"id": "CVE-2025-50182", "noindex": false, "published": "2025-06-19T01:42:44.921Z", "modified": "2025-12-22T18:43:46.779Z", "cvss": 5.3, "cvss_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N", "severity": "medium", "epss": 0.00393, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2025-50182", "title": "urllib3 does not control redirects in browsers and Node.js", "description": "urllib3 is a user-friendly HTTP client library for Python. Starting in version 2.2.0 and prior to 2.5.0, urllib3 does not control redirects in browsers and Node.js. urllib3 supports being used in a Pyodide runtime utilizing the JavaScript Fetch API or falling back on XMLHttpRequest. This means Python libraries can be used to make HTTP requests from a browser or Node.js. Additionally, urllib3 provides a mechanism to control redirects, but the retries and redirect parameters are ignored with Pyodide; the runtime itself determines redirect behavior. This issue has been patched in version 2.5.0.", "references": ["https://github.com/urllib3/urllib3/security/advisories/GHSA-48p4-8xcf-vxj5", "https://github.com/urllib3/urllib3/commit/7eb4a2aafe49a279c29b6d1f0ed0f42e9736194f", "https://github.com/urllib3/urllib3/releases/tag/2.5.0"], "fixes": ["2.3.0-3"], "products": [{"name": "python-urllib3", "path": "vulns/debian-14/python-urllib3", "ecosystem": "Debian:14"}]}, {"id": "CVE-2025-50181", "noindex": false, "published": "2025-06-19T01:08:00.340Z", "modified": "2025-12-22T18:44:17.668Z", "cvss": 5.3, "cvss_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N", "severity": "medium", "epss": 0.00474, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2025-50181", "title": "urllib3 redirects are not disabled when retries are disabled on PoolManager instantiation", "description": "urllib3 is a user-friendly HTTP client library for Python. Prior to 2.5.0, it is possible to disable redirects for all requests by instantiating a PoolManager and specifying retries in a way that disable redirects. By default, requests and botocore users are not affected. An application attempting to mitigate SSRF or open redirect vulnerabilities by disabling redirects at the PoolManager level will remain vulnerable. This issue has been patched in version 2.5.0.", "references": ["https://github.com/urllib3/urllib3/security/advisories/GHSA-pq67-6m6q-mj2v", "https://github.com/urllib3/urllib3/commit/f05b1329126d5be6de501f9d1e3e36738bc08857", "https://github.com/urllib3/urllib3/releases/tag/2.5.0"], "fixes": ["2.3.0-3"], "products": [{"name": "python-urllib3", "path": "vulns/debian-14/python-urllib3", "ecosystem": "Debian:14"}]}, {"id": "CVE-2024-37891", "noindex": false, "published": "2024-06-17T19:18:32.574Z", "modified": "2025-11-03T21:55:35.021Z", "cvss": 4.4, "cvss_vector": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N", "severity": "medium", "epss": 0.01141, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2024-37891", "title": "Proxy-Authorization request header isn't stripped during cross-origin redirects in urllib3", "description": " urllib3 is a user-friendly HTTP client library for Python. When using urllib3's proxy support with `ProxyManager`, the `Proxy-Authorization` header is only sent to the configured proxy, as expected. However, when sending HTTP requests *without* using urllib3's proxy support, it's possible to accidentally configure the `Proxy-Authorization` header even though it won't have any effect as the request is not using a forwarding proxy or a tunneling proxy. In those cases, urllib3 doesn't treat the `Proxy-Authorization` HTTP header as one carrying authentication material and thus doesn't strip the header on cross-origin redirects. Because this is a", "references": ["https://github.com/urllib3/urllib3/security/advisories/GHSA-34jh-p97f-mpxf", "https://github.com/urllib3/urllib3/commit/accff72ecc2f6cf5a76d9570198a93ac7c90270e", "https://www.vicarius.io/vsociety/posts/proxy-authorization-header-handling-vulnerability-in-urllib3-cve-2024-37891"], "fixes": ["2.2.3-3"], "products": [{"name": "python-urllib3", "path": "vulns/debian-14/python-urllib3", "ecosystem": "Debian:14"}]}, {"id": "CVE-2023-45803", "noindex": false, "published": "2023-10-17T19:43:45.404Z", "modified": "2025-11-03T21:49:53.115Z", "cvss": 4.2, "cvss_vector": "CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N", "severity": "medium", "epss": 0.00593, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2023-45803", "title": "Request body not stripped after redirect in urllib3", "description": "urllib3 is a user-friendly HTTP client library for Python. urllib3 previously wouldn't remove the HTTP request body when an HTTP redirect response using status 301, 302, or 303 after the request had its method changed from one that could accept a request body (like `POST`) to `GET` as is required by HTTP RFCs. Although this behavior is not specified in the section for redirects, it can be inferred by piecing together information from different sections and we have observed the behavior in other major HTTP client implementations like curl and web browsers. Because the vulnerability requires a previously trusted service to become compromised in", "references": ["https://github.com/urllib3/urllib3/security/advisories/GHSA-g4mx-q9vg-27p4", "https://github.com/urllib3/urllib3/commit/4e98d57809dacab1cbe625fddeec1a290c478ea9", "https://www.rfc-editor.org/rfc/rfc9110.html#name-get"], "fixes": ["1.26.18-1"], "products": [{"name": "python-urllib3", "path": "vulns/debian-14/python-urllib3", "ecosystem": "Debian:14"}]}, {"id": "CVE-2018-25091", "noindex": false, "published": "2023-10-15T00:00:00.000Z", "modified": "2024-09-16T19:01:58.850Z", "cvss": 6.1, "cvss_vector": "", "severity": "medium", "epss": 0.00594, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2018-25091", "title": "CVE-2018-25091", "description": "urllib3 before 1.24.2 does not remove the authorization HTTP header when following a cross-origin redirect (i.e., a redirect that differs in host, port, or scheme). This can allow for credentials in the authorization header to be exposed to unintended hosts or transmitted in cleartext. NOTE: this issue exists because of an incomplete fix for CVE-2018-20060 (which was case-sensitive).", "references": ["https://github.com/urllib3/urllib3/issues/1510", "https://github.com/urllib3/urllib3/commit/adb358f8e06865406d1f05e581a16cbea2136fbc", "https://github.com/urllib3/urllib3/compare/1.24.1...1.24.2"], "fixes": ["1.25.6-4"], "products": [{"name": "python-urllib3", "path": "vulns/debian-14/python-urllib3", "ecosystem": "Debian:14"}]}, {"id": "CVE-2023-43804", "noindex": false, "published": "2023-10-04T16:01:50.447Z", "modified": "2025-11-03T21:49:44.074Z", "cvss": 5.9, "cvss_vector": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N", "severity": "medium", "epss": 0.0136, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2023-43804", "title": "`Cookie` HTTP header isn't stripped on cross-origin redirects", "description": "urllib3 is a user-friendly HTTP client library for Python. urllib3 doesn't treat the `Cookie` HTTP header special or provide any helpers for managing cookies over HTTP, that is the responsibility of the user. However, it is possible for a user to specify a `Cookie` header and unknowingly leak information via HTTP redirects to a different origin if that user doesn't disable redirects explicitly. This issue has been patched in urllib3 version 1.26.17 or 2.0.5.", "references": ["https://github.com/urllib3/urllib3/security/advisories/GHSA-v845-jxx5-vc9f", "https://github.com/urllib3/urllib3/commit/01220354d389cd05474713f8c982d05c9b17aafb", "https://github.com/urllib3/urllib3/commit/644124ecd0b6e417c527191f866daa05a5a2056d"], "fixes": ["1.26.17-1"], "products": [{"name": "python-urllib3", "path": "vulns/debian-14/python-urllib3", "ecosystem": "Debian:14"}]}, {"id": "CVE-2021-33503", "noindex": false, "published": "2021-06-29T10:55:35.000Z", "modified": "2024-08-03T23:50:42.973Z", "cvss": 7.5, "cvss_vector": "", "severity": "high", "epss": 0.03273, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2021-33503", "title": "CVE-2021-33503", "description": "An issue was discovered in urllib3 before 1.26.5. When provided with a URL containing many @ characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.", "references": ["https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FMUGWEAUYGGHTPPXT6YBD53WYXQGVV73/", "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6SCV7ZNAHS3E6PBFLJGENCDRDRWRZZ6W/", "https://security.gentoo.org/glsa/202107-36"], "fixes": ["1.26.5-1~exp1"], "products": [{"name": "python-urllib3", "path": "vulns/debian-14/python-urllib3", "ecosystem": "Debian:14"}]}, {"id": "CVE-2021-28363", "noindex": false, "published": "2021-03-15T00:00:00.000Z", "modified": "2026-10-14T11:39:31.637Z", "cvss": 6.5, "cvss_vector": "", "severity": "medium", "epss": 0.02166, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2021-28363", "title": "CVE-2021-28363", "description": "The urllib3 library 1.26.x before 1.26.4 for Python omits SSL certificate validation in some cases involving HTTPS to HTTPS proxies. The initial connection to the HTTPS proxy (if an SSLContext isn't given via proxy_config) doesn't verify the hostname of the certificate. This means certificates for different servers that still validate properly with the default urllib3 SSLContext will be silently accepted.", "references": ["https://github.com/urllib3/urllib3/commits/main", "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4S65ZQVZ2ODGB52IC7VJDBUK4M5INCXL/", "https://security.gentoo.org/glsa/202107-36"], "fixes": ["1.26.4-1"], "products": [{"name": "python-urllib3", "path": "vulns/debian-14/python-urllib3", "ecosystem": "Debian:14"}]}, {"id": "CVE-2020-26137", "noindex": false, "published": "2020-09-29T00:00:00.000Z", "modified": "2024-08-04T15:49:07.138Z", "cvss": 6.5, "cvss_vector": "", "severity": "medium", "epss": 0.02269, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2020-26137", "title": "CVE-2020-26137", "description": "urllib3 before 1.25.9 allows CRLF injection if the attacker controls the HTTP request method, as demonstrated by inserting CR and LF control characters in the first argument of putrequest(). NOTE: this is similar to CVE-2020-26116.", "references": ["https://bugs.python.org/issue39603", "https://github.com/urllib3/urllib3/pull/1800", "https://github.com/urllib3/urllib3/commit/1dd69c5c5982fae7c87a620d487c2ebf7a6b436b"], "fixes": ["1.25.9-1"], "products": [{"name": "python-urllib3", "path": "vulns/debian-14/python-urllib3", "ecosystem": "Debian:14"}]}, {"id": "CVE-2020-7212", "noindex": false, "published": "2020-03-06T19:14:54.000Z", "modified": "2024-08-04T09:25:48.318Z", "cvss": 7.5, "cvss_vector": "", "severity": "high", "epss": 0.03371, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2020-7212", "title": "CVE-2020-7212", "description": "The _encode_invalid_chars function in util/url.py in the urllib3 library 1.25.2 through 1.25.7 for Python allows a denial of service (CPU consumption) because of an inefficient algorithm. The percent_encodings array contains all matches of percent encodings. It is not deduplicated. For a URL of length N, the size of percent_encodings may be up to O(N). The next step (normalize existing percent-encoded bytes) also takes up to O(N) for each step, so the total time is O(N^2). If percent_encodings were deduplicated, the time to compute _encode_invalid_chars would be O(kN), where k is at most 484 ((10+6*2)^2).", "references": ["https://github.com/urllib3/urllib3/blob/master/CHANGES.rst", "https://github.com/urllib3/urllib3/commit/a74c9cfbaed9f811e7563cfc3dce894928e0221a", "https://pypi.org/project/urllib3/1.25.8/"], "fixes": ["1.25.8-1"], "products": [{"name": "python-urllib3", "path": "vulns/debian-14/python-urllib3", "ecosystem": "Debian:14"}]}, {"id": "CVE-2019-11324", "noindex": false, "published": "2019-04-18T00:00:00.000Z", "modified": "2024-08-04T22:48:09.221Z", "cvss": 7.5, "cvss_vector": "", "severity": "high", "epss": 0.02915, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2019-11324", "title": "CVE-2019-11324", "description": "The urllib3 library before 1.24.2 for Python mishandles certain cases where the desired set of CA certificates is different from the OS store of CA certificates, which results in SSL connections succeeding in situations where a verification failure is the correct outcome. This is related to use of the ssl_context, ca_certs, or ca_certs_dir argument.", "references": ["https://github.com/urllib3/urllib3/compare/a6ec68a...1efadf4", "http://www.openwall.com/lists/oss-security/2019/04/19/1", "https://usn.ubuntu.com/3990-1/"], "fixes": ["1.25.6-4"], "products": [{"name": "python-urllib3", "path": "vulns/debian-14/python-urllib3", "ecosystem": "Debian:14"}]}, {"id": "CVE-2019-11236", "noindex": false, "published": "2019-04-15T00:00:00.000Z", "modified": "2024-08-04T22:48:09.019Z", "cvss": 6.1, "cvss_vector": "", "severity": "medium", "epss": 0.02073, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2019-11236", "title": "CVE-2019-11236", "description": "In the urllib3 library through 1.24.1 for Python, CRLF injection is possible if the attacker controls the request parameter.", "references": ["https://github.com/urllib3/urllib3/issues/1553", "https://usn.ubuntu.com/3990-1/", "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TBI45HO533KYHNB5YRO43TBYKA3E3VRL/"], "fixes": ["1.25.6-4"], "products": [{"name": "python-urllib3", "path": "vulns/debian-14/python-urllib3", "ecosystem": "Debian:14"}]}], "total": 22, "unknown_count": 0, "release_unconfirmed": false, "page": 1, "pages": 2, "filtered": false, "noindex": false, "filters": {}, "page_size": 20, "products": [{"name": "python-urllib3", "path": "vulns/debian-14/python-urllib3", "ecosystem": "Debian:14"}], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}, {"name": "web", "path": "vulns/stack/web", "slug": "web"}, {"name": "php", "path": "vulns/stack/php", "slug": "php"}, {"name": "python", "path": "vulns/stack/python", "slug": "python"}, {"name": "node", "path": "vulns/stack/node", "slug": "node"}, {"name": "database", "path": "vulns/stack/database", "slug": "database"}, {"name": "containers", "path": "vulns/stack/containers", "slug": "containers"}, {"name": "network", "path": "vulns/stack/network", "slug": "network"}, {"name": "applications", "path": "vulns/stack/applications", "slug": "applications"}], "versions": [], "stats": {"recent": 3, "kev": 0}, "lastmod": "2026-10-14T11:39:31.637Z", "early_advisories": [], "license": "Sie dürfen die Auswahl von PatchFirst und unsere Ergänzungen (Prioritäten, Frühwarnungen, Texte, Zusammenfassungen und Aggregate) für eigene Zwecke einschließlich interner geschäftlicher Aufgaben frei nutzen. Weiterverkauf, kommerzielle Verbreitung und massenhafte Spiegelung dieser Auswahl oder Ergänzungen erfordern eine schriftliche Vereinbarung mit dem Betreiber. Nennen Sie bei jeder Nutzung oder Veröffentlichung der Auswahl oder unserer Ergänzungen PatchFirst (https://patchfirst.dev/vulns/) mit diesem Link zur Feedseite Ihrer Region als Quelle. Originaleinträge aus offenen Quellen unterliegen weiterhin ihren jeweiligen Lizenzen und Bedingungen. Diese Bedingungen beschränken Ihre Rechte an den Originaldaten nicht, die Sie direkt bei den Quellen beziehen können.", "terms_url": "https://patchfirst.dev/de/vulns/#feed-terms", "attribution": {"name": "PatchFirst", "url": "https://patchfirst.dev/vulns/"}, "source_changes": "PatchFirst wählt Einträge aus, normalisiert und kombiniert sie; Zusammenfassungen und Übersetzungen können hinzukommen. Nachrichten werden im jeweiligen Eintrag mit einem Link zur Originalquelle belegt.", "sources": [{"id": "cve", "name": "CVE List / CVE.org", "url": "https://www.cve.org/", "license": "CVE Terms of Use", "terms_url": "https://www.cve.org/Legal/TermsOfUse", "notice": "Copyright © 1999–2021, The MITRE Corporation. LICENSE Submissions : For all materials you submit to the Common Vulnerabilities and Exposures (CVE™), you hereby grant to The MITRE Corporation (MITRE) and all CVE Numbering Authorities (CNAs) a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute such materials and derivative works. Unless required by applicable law or agreed to in writing, you provide such materials on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied, including, without limitation, any warranties or conditions of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE. CVE Usage : MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy. DISCLAIMERS ALL DOCUMENTS AND THE INFORMATION CONTAINED THEREIN PROVIDED BY MITRE ARE PROVIDED ON AN \"AS IS\" BASIS AND THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY), THE MITRE CORPORATION, ITS BOARD OF TRUSTEES, OFFICERS, AGENTS, AND EMPLOYEES, DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION THEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE."}, {"id": "osv", "name": "OSV", "url": "https://osv.dev/", "terms_url": "https://google.github.io/osv.dev/data/", "terms": "Die Lizenzen der Ursprungsdatenbanken unterscheiden sich; siehe Quellenkatalog."}, {"id": "kev", "name": "CISA KEV", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "license": "CC0-1.0", "terms_url": "https://github.com/cisagov/kev-data/blob/develop/LICENSE"}, {"id": "epss", "name": "FIRST EPSS", "url": "https://www.first.org/epss/", "terms_url": "https://www.first.org/epss/faq", "terms": "Frei zugängliche Bewertungen; Quellenangabe erbeten (FIRST EPSS, Bewertungen von Empirical Security)."}, {"id": "github-advisory", "name": "GitHub Advisory Database", "url": "https://github.com/advisories", "license": "CC-BY-4.0", "terms_url": "https://github.com/github/advisory-database/blob/main/LICENSE.md"}, {"id": "exploitdb", "name": "Exploit-DB", "url": "https://www.exploit-db.com/", "license": "GPL-2.0", "terms_url": "https://gitlab.com/exploit-database/exploitdb/-/blob/main/LICENSE.md"}, {"id": "metasploit", "name": "Metasploit", "url": "https://github.com/rapid7/metasploit-framework", "license": "BSD-3-Clause", "terms_url": "https://github.com/rapid7/metasploit-framework/blob/master/LICENSE", "notice": "Copyright (c) 2006-2026, Rapid7, Inc.\nLicense: BSD-3-clause\n Redistribution and use in source and binary forms, with or without modification,\n are permitted provided that the following conditions are met:\n .\n * Redistributions of source code must retain the above copyright notice,\n this list of conditions and the following disclaimer.\n .\n * Redistributions in binary form must reproduce the above copyright notice,\n this list of conditions and the following disclaimer in the documentation\n and/or other materials provided with the distribution.\n .\n * Neither the name of Rapid7, Inc. nor the names of its contributors\n may be used to endorse or promote products derived from this software\n without specific prior written permission.\n .\n THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\" AND\n ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\n WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\n DISCLAIMED. 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