{"id":"UBUNTU-CVE-2026-102265","details":"PyJWT is a Python implementation of JSON Web Token standards. From 2.13.0 until 2.14.0, PyJWS._load in jwt/api_jws.py is affected because parser catches ValueError but not RecursionError. This occurs when a deeply nested token header reaches json.loads. As a result, RecursionError escapes the documented PyJWT error hierarchy. Consequently, an unauthenticated malformed token can cause a request-level failure and HTTP 500. This issue is fixed in version 2.14.0.","modified":"2026-09-29T23:41:45.272945185Z","published":"2026-09-29T00:00:00Z","upstream":["CVE-2026-102265"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-102265"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-102265"},{"type":"REPORT","url":"https://github.com/jpadilla/pyjwt/security/advisories/GHSA-8wjv-2p76-3863"},{"type":"REPORT","url":"https://github.com/jpadilla/pyjwt/commit/06573692ebcdec8831c3927513b3e87c31fbbb62"},{"type":"REPORT","url":"https://github.com/jpadilla/pyjwt/releases/tag/2.14.0"}],"affected":[{"package":{"name":"pyjwt","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/pyjwt?arch=source&distro=esm-infra-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.0-0ubuntu1","1.3.0-1","1.3.0-1ubuntu0.1","1.3.0-1ubuntu0.1+esm1","1.3.0-1ubuntu0.1+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"python-jwt","binary_version":"1.3.0-1ubuntu0.1+esm2"},{"binary_version":"1.3.0-1ubuntu0.1+esm2","binary_name":"python3-jwt"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102265.json"}},{"package":{"name":"pyjwt","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/pyjwt?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.2-1.1","1.5.3+ds1-1","1.5.3+ds1-1ubuntu0.1","1.5.3+ds1-1ubuntu0.1+esm1","1.5.3+ds1-1ubuntu0.1+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"python-jwt","binary_version":"1.5.3+ds1-1ubuntu0.1+esm2"},{"binary_version":"1.5.3+ds1-1ubuntu0.1+esm2","binary_name":"python3-jwt"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102265.json"}},{"package":{"name":"pyjwt","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/pyjwt?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.7.0-2","1.7.1-1","1.7.1-2ubuntu1","1.7.1-2ubuntu2","1.7.1-2ubuntu2.1","1.7.1-2ubuntu2.1+esm1","1.7.1-2ubuntu2.1+esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.7.1-2ubuntu2.1+esm2","binary_name":"python3-jwt"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102265.json"}},{"package":{"name":"pyjwt","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/pyjwt?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.7.1-2ubuntu2","2.1.0-1","2.3.0-1","2.3.0-1ubuntu0.1","2.3.0-1ubuntu0.2","2.3.0-1ubuntu0.3","2.3.0-1ubuntu0.4"],"ecosystem_specific":{"binaries":[{"binary_version":"2.3.0-1ubuntu0.4","binary_name":"python3-jwt"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102265.json"}},{"package":{"name":"pyjwt","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/pyjwt?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.7.0-1","2.7.0-1ubuntu0.1","2.7.0-1ubuntu0.2"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-jwt","binary_version":"2.7.0-1ubuntu0.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102265.json"}},{"package":{"name":"pyjwt","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/pyjwt?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.10.1-2","2.10.1-3","2.10.1-3build1","2.10.1-4","2.10.1-4ubuntu1","2.10.1-4ubuntu1.1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.10.1-4ubuntu1.1","binary_name":"python3-jwt"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102265.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]}