{"kind": "product", "path": "vulns/pypi/joserfc", "name": "joserfc", "product": "joserfc", "ecosystem": "PyPI", "items": [{"id": "CVE-2026-49852", "noindex": false, "published": "2026-07-17T19:14:58.019Z", "modified": "2026-07-20T14:58:41.701Z", "cvss": 8.7, "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N", "severity": "high", "epss": 0.00171, "kev": false, "exploits": [], "stacks": [{"name": "python", "path": "vulns/stack/python", "slug": "python"}], "path": "vulns/cve-2026-49852", "title": "joserfc: HS256/HS384/HS512 verify accepts empty/nil HMAC key (cross-language sibling of CVE-2026-45363)", "description": "joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. Prior to 1.6.8, joserfc.jwt.decode accepts attacker-forged HMAC-signed tokens when the caller-supplied verification key is the empty string or None, because HMACAlgorithm.sign and HMACAlgorithm.verify in src/joserfc/_rfc7518/jws_algs.py pass the output of OctKey.get_op_key(...) to hmac.new(...) and OctKey.import_key in src/joserfc/_rfc7518/oct_key.py only emits a SecurityWarning for keys shorter than 14 bytes without rejecting zero-length input. This issue is fixed in version 1.6.8.", "references": ["https://github.com/authlib/joserfc/security/advisories/GHSA-gg9x-qcx2-xmrh", "https://github.com/authlib/joserfc/commit/86d00910b2b2d2d07503fee9b572906daefab7f1", "https://github.com/authlib/joserfc/releases/tag/1.6.8"], "fixes": ["1.6.8"], "products": [{"name": "joserfc", "path": "vulns/pypi/joserfc", "ecosystem": "PyPI"}]}, {"id": "CVE-2026-48990", "noindex": false, "published": "2026-06-17T21:08:10.534Z", "modified": "2026-06-18T12:51:59.900Z", "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": 0.00163, "kev": false, "exploits": [], "stacks": [{"name": "python", "path": "vulns/stack/python", "slug": "python"}], "path": "vulns/cve-2026-48990", "title": "joserfc: b64=false RFC7797 JWS payloads bypass JWSRegistry payload-size limits during deserialization", "description": "joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. In versions 1.3.4 through 1.6.5, joserfc accepts oversized RFC7797 b64=false JWS payloads without applying JWSRegistry.max_payload_length, which can lead to resource exhaustion. The normal JWS compact and flattened JSON paths reject payloads above the configured payload-size limit with ExceededSizeError. The RFC7797 unencoded payload paths do not make the same check. A valid b64=false compact or flattened JSON JWS can therefore deserialize successfully with a payload larger than JWSRegistry.max_payload_length. Applicatio", "references": ["https://github.com/authlib/joserfc/security/advisories/GHSA-wphv-vfrh-23q5", "https://github.com/authlib/joserfc/releases/tag/1.6.7", "https://nvd.nist.gov/vuln/detail/CVE-2026-48990"], "fixes": ["1.6.7"], "products": [{"name": "joserfc", "path": "vulns/pypi/joserfc", "ecosystem": "PyPI"}]}, {"id": "CVE-2026-27932", "noindex": false, "published": "2026-03-03T22:48:21.306Z", "modified": "2026-03-04T21:20:55.097Z", "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": 0.0044, "kev": false, "exploits": [], "stacks": [{"name": "python", "path": "vulns/stack/python", "slug": "python"}], "path": "vulns/cve-2026-27932", "title": "joserfc PBES2 p2c Unbounded Iteration Count enables Denial of Service (DoS)", "description": "joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. In 1.6.2 and earlier, a resource exhaustion vulnerability in joserfc allows an unauthenticated attacker to cause a Denial of Service (DoS) via CPU exhaustion. When the library decrypts a JSON Web Encryption (JWE) token using Password-Based Encryption (PBES2) algorithms, it reads the p2c (PBES2 Count) parameter directly from the token's protected header. This parameter defines the number of iterations for the PBKDF2 key derivation function. Because joserfc does not validate or bound this value, an attacker can specify an ", "references": ["https://github.com/authlib/joserfc/security/advisories/GHSA-w5r5-m38g-f9f9", "https://github.com/authlib/joserfc/commit/696a9611ab982c45ee2190ed79ca8e1d8e09398f", "https://nvd.nist.gov/vuln/detail/CVE-2026-27932"], "fixes": ["1.6.3"], "products": [{"name": "joserfc", "path": "vulns/pypi/joserfc", "ecosystem": "PyPI"}]}, {"id": "CVE-2025-65015", "noindex": false, "published": "2025-11-18T23:07:44.328Z", "modified": "2025-11-19T17:12:04.336Z", "cvss": 9.2, "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H", "severity": "critical", "epss": 0.0044, "kev": false, "exploits": [], "stacks": [{"name": "python", "path": "vulns/stack/python", "slug": "python"}], "path": "vulns/cve-2025-65015", "title": "joserfc has Possible Uncontrolled Resource Consumption Vulnerability Triggered by Logging Arbitrarily Large JWT Token Payloads", "description": "joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. In versions from 1.3.3 to before 1.3.5 and from 1.4.0 to before 1.4.2, the ExceededSizeError exception messages are embedded with non-decoded JWT token parts and may cause Python logging to record an arbitrarily large, forged JWT payload. In situations where a misconfigured — or entirely absent — production-grade web server sits in front of a Python web application, an attacker may be able to send arbitrarily large bearer tokens in the HTTP request headers. When this occurs, Python logging or diagnostic tools (e.g., Sent", "references": ["https://github.com/authlib/joserfc/security/advisories/GHSA-frfh-8v73-gjg4", "https://github.com/authlib/joserfc/commit/63932f169d924caffafa761af2122b82059017f7", "https://github.com/authlib/joserfc/commit/673c8743fd0605b0e1de6452be6cba75f44e466b"], "fixes": ["1.3.5", "1.4.2"], "products": [{"name": "joserfc", "path": "vulns/pypi/joserfc", "ecosystem": "PyPI"}, {"name": "joserfc", "path": "vulns/pypi/joserfc", "ecosystem": "PyPI"}, {"name": "joserfc", "path": "vulns/pypi/joserfc", "ecosystem": "PyPI"}]}], "total": 4, "unknown_count": 0, "release_unconfirmed": false, "page": 1, "pages": 1, "filtered": false, "noindex": false, "filters": {}, "page_size": 20, "products": [{"name": "joserfc", "path": "vulns/pypi/joserfc", "ecosystem": "PyPI"}], "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": "2026-07-20T14:58:41.701Z", "early_advisories": [], "license": "You may freely use the PatchFirst selection and our additions (priorities, early warnings, texts, summaries and aggregates) for your own purposes, including internal business use. Resale, commercial distribution and bulk mirroring of this selection or these additions require a written agreement with the operator. Whenever you use or publish the selection or our additions, credit PatchFirst (https://patchfirst.dev/vulns/) with this link to the regional feed page. Original records from open sources remain subject to their respective licenses and terms. These conditions do not restrict your rights to the original data, which you can obtain directly from those sources.", "terms_url": "https://patchfirst.dev/vulns/#feed-terms", "attribution": {"name": "PatchFirst", "url": "https://patchfirst.dev/vulns/"}, "source_changes": "Records are selected, normalized and combined by PatchFirst; summaries and translations may be added. News is credited with a link to the original source in each entry.", "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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