{"kind": "product", "path": "vulns/debian-12/python-multipart", "name": "python-multipart", "product": "python-multipart", "ecosystem": "Debian:12", "items": [{"id": "CVE-2026-53540", "noindex": false, "published": "2026-06-22T16:58:54.923Z", "modified": "2026-06-22T17:21:55.932Z", "cvss": 3.7, "cvss_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "severity": "low", "epss": 0.00342, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2026-53540", "title": "Python-Multipart: Negative Content-Length in parse_form buffers the entire body in memory", "description": "Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.31, parse_form() did not validate the Content-Length header before using it to bound its chunked read of the request body. A negative Content-Length turned the bounded read into a read-until-EOF, so the entire body was loaded into memory in a single read instead of in fixed-size chunks. This vulnerability is fixed in 0.0.31.", "references": ["https://github.com/Kludex/python-multipart/security/advisories/GHSA-v9pg-7xvm-68hf", "https://nvd.nist.gov/vuln/detail/CVE-2026-53540"], "fixes": [], "products": [{"name": "python-multipart", "path": "vulns/debian-12/python-multipart", "ecosystem": "Debian:12"}]}, {"id": "CVE-2026-53538", "noindex": false, "published": "2026-06-22T16:56:32.628Z", "modified": "2026-06-23T16:08:22.050Z", "cvss": 3.7, "cvss_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N", "severity": "low", "epss": 0.00256, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2026-53538", "title": "Python-Multipart: Semicolon treated as querystring field separator enables parameter smuggling", "description": "Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.30, QuerystringParser treated ; as a field separator in application/x-www-form-urlencoded bodies, in addition to &. The WHATWG URL standard, modern browsers, and Python's urllib.parse (since the CVE-2021-23336 fix) treat only & as a separator. This creates a parser differential: the same bytes are tokenized into different fields than a WHATWG compliant intermediary would produce, allowing an attacker to smuggle extra form fields past an upstream body inspecting component. This vulnerability is fixed in 0.0.30.", "references": ["https://github.com/Kludex/python-multipart/security/advisories/GHSA-6jv3-5f52-599m", "https://nvd.nist.gov/vuln/detail/CVE-2026-53538"], "fixes": [], "products": [{"name": "python-multipart", "path": "vulns/debian-12/python-multipart", "ecosystem": "Debian:12"}]}, {"id": "CVE-2026-53539", "noindex": false, "published": "2026-06-22T16:55:42.787Z", "modified": "2026-06-23T16:08:36.474Z", "cvss": 7.5, "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "severity": "high", "epss": 0.0046, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2026-53539", "title": "Python-Multipart: Quadratic-time querystring parsing with semicolon separators causes CPU denial of service", "description": "Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.30, when parsing application/x-www-form-urlencoded bodies, QuerystringParser located the field separator with a two step lookup: it first scanned the entire remaining buffer for &, and only when no & existed anywhere ahead did it fall back to scanning for ;. For a body that uses ; as the separator and contains no &, every field iteration performed a full failed & scan over the entire remaining buffer before locating the nearby ;. With N semicolon separated fields in a chunk of size B, this yields O(B^2) byte comparisons per chunk. An attacker can submit a small crafted ", "references": ["https://github.com/Kludex/python-multipart/security/advisories/GHSA-5rvq-cxj2-64vf", "https://nvd.nist.gov/vuln/detail/CVE-2026-53539"], "fixes": [], "products": [{"name": "python-multipart", "path": "vulns/debian-12/python-multipart", "ecosystem": "Debian:12"}]}, {"id": "CVE-2026-42561", "noindex": false, "published": "2026-05-13T20:55:11.767Z", "modified": "2026-08-07T12:04:48.215Z", "cvss": 7.5, "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "severity": "high", "epss": 0.0074, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2026-42561", "title": "Python-Multipart: Denial of Service via unbounded multipart part headers", "description": "Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.27, python-multipart has a denial of service vulnerability in multipart part header parsing. When parsing multipart/form-data, MultipartParser previously had no limit on the number of part headers or the size of an individual part header. An attacker could send a request with either many repeated headers without terminating the header block or a single very large header value, causing excessive CPU work before request rejection or completion. This vulnerability is fixed in 0.0.27.", "references": ["https://github.com/Kludex/python-multipart/security/advisories/GHSA-pp6c-gr5w-3c5g", "https://access.redhat.com/security/cve/CVE-2026-42561", "https://bugzilla.redhat.com/show_bug.cgi?id=2477309"], "fixes": [], "products": [{"name": "python-multipart", "path": "vulns/debian-12/python-multipart", "ecosystem": "Debian:12"}]}, {"id": "CVE-2026-40347", "noindex": false, "published": "2026-04-17T23:56:50.777Z", "modified": "2026-04-20T15:46:40.011Z", "cvss": 5.3, "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "severity": "medium", "epss": 0.00351, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2026-40347", "title": "Python-Multipart affected by Denial of Service via large multipart preamble or epilogue data", "description": "Python-Multipart is a streaming multipart parser for Python. Versions prior to 0.0.26 have a denial of service vulnerability when parsing crafted `multipart/form-data` requests with large preamble or epilogue sections. Upgrade to version 0.0.26 or later, which skips ahead to the next boundary candidate when processing leading CR/LF data and immediately discards epilogue data after the closing boundary.", "references": ["https://github.com/Kludex/python-multipart/security/advisories/GHSA-mj87-hwqh-73pj", "https://github.com/Kludex/python-multipart/releases/tag/0.0.26", "https://nvd.nist.gov/vuln/detail/CVE-2026-40347"], "fixes": [], "products": [{"name": "python-multipart", "path": "vulns/debian-12/python-multipart", "ecosystem": "Debian:12"}]}, {"id": "CVE-2026-24486", "noindex": false, "published": "2026-01-27T00:34:06.229Z", "modified": "2026-09-16T12:04:19.486Z", "cvss": 8.6, "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L", "severity": "high", "epss": 0.02206, "kev": false, "exploits": ["exploitdb"], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2026-24486", "title": "Python-Multipart has Arbitrary File Write via Non-Default Configuration", "description": "Python-Multipart is a streaming multipart parser for Python. Prior to version 0.0.22, a Path Traversal vulnerability exists when using non-default configuration options `UPLOAD_DIR` and `UPLOAD_KEEP_FILENAME=True`. An attacker can write uploaded files to arbitrary locations on the filesystem by crafting a malicious filename. Users should upgrade to version 0.0.22 to receive a patch or, as a workaround, avoid using `UPLOAD_KEEP_FILENAME=True` in project configurations.", "references": ["https://github.com/Kludex/python-multipart/security/advisories/GHSA-wp53-j4wj-2cfg", "https://github.com/Kludex/python-multipart/commit/9433f4bbc9652bdde82bbe380984e32f8cfc89c4", "https://github.com/Kludex/python-multipart/releases/tag/0.0.22"], "fixes": [], "products": [{"name": "python-multipart", "path": "vulns/debian-12/python-multipart", "ecosystem": "Debian:12"}]}, {"id": "CVE-2024-53981", "noindex": false, "published": "2024-12-02T15:57:50.232Z", "modified": "2024-12-02T19:59:14.830Z", "cvss": 7.5, "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "severity": "high", "epss": 0.00635, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2024-53981", "title": "python-multipart has a Denial of service (DoS) via deformation `multipart/form-data` boundary", "description": "python-multipart is a streaming multipart parser for Python. When parsing form data, python-multipart skips line breaks (CR \\r or LF \\n) in front of the first boundary and any tailing bytes after the last boundary. This happens one byte at a time and emits a log event each time, which may cause excessive logging for certain inputs. An attacker could abuse this by sending a malicious request with lots of data before the first or after the last boundary, causing high CPU load and stalling the processing thread for a significant amount of time. In case of ASGI application, this could stall the event loop and prevent other requests from being pro", "references": ["https://github.com/Kludex/python-multipart/security/advisories/GHSA-59g5-xgcq-4qw3", "https://github.com/Kludex/python-multipart/commit/c4fe4d3cebc08c660e57dd709af1ffa7059b3177", "https://nvd.nist.gov/vuln/detail/CVE-2024-53981"], "fixes": [], "products": [{"name": "python-multipart", "path": "vulns/debian-12/python-multipart", "ecosystem": "Debian:12"}]}, {"id": "CVE-2024-24762", "noindex": false, "published": "2024-02-05T14:33:06.481Z", "modified": "2025-05-09T16:32:50.015Z", "cvss": 7.5, "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "severity": "high", "epss": 0.01523, "kev": false, "exploits": [], "stacks": [{"name": "system", "path": "vulns/stack/system", "slug": "system"}], "path": "vulns/cve-2024-24762", "title": "python-multipart vulnerable to content-type header Regular expression Denial of Service", "description": "`python-multipart` is a streaming multipart parser for Python. When using form data, `python-multipart` uses a Regular Expression to parse the HTTP `Content-Type` header, including options. An attacker could send a custom-made `Content-Type` option that is very difficult for the RegEx to process, consuming CPU resources and stalling indefinitely (minutes or more) while holding the main event loop. This means that process can't handle any more requests, leading to regular expression denial of service. This vulnerability has been patched in version 0.0.7.", "references": ["https://github.com/Kludex/python-multipart/security/advisories/GHSA-2jv5-9r88-3w3p", "https://github.com/Kludex/python-multipart/commit/20f0ef6b4e4caf7d69a667c54dff57fe467109a4", "https://github.com/tiangolo/fastapi/security/advisories/GHSA-qf9m-vfgh-m389"], "fixes": [], "products": [{"name": "python-multipart", "path": "vulns/debian-12/python-multipart", "ecosystem": "Debian:12"}]}], "total": 8, "unknown_count": 0, "release_unconfirmed": false, "page": 1, "pages": 1, "filtered": false, "noindex": false, "filters": {}, "page_size": 20, "products": [{"name": "python-multipart", "path": "vulns/debian-12/python-multipart", "ecosystem": "Debian:12"}], "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": 0, "kev": 0}, "lastmod": "2026-09-16T12:04:19.486Z", "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. 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