{"id":"CVE-2026-101917","revision":"d72481360bae4ca599fd2cdd35fad82b","records":[{"revision":"d72481360bae4ca599fd2cdd35fad82b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-101917","aliases":[],"title":"PyJWT: PyJWKClient still amplifies unauthenticated JWKS fetches on unknown kid values (incomplete fix of CVE-2026-48524)","description":"PyJWT is a Python implementation of JSON Web Token standards. Prior to 2.14.0, PyJWT get_signing_key_from_jwt is affected because unknown kid misses force refreshes without a negative cache or minimum refresh interval. This occurs when unauthenticated tokens repeatedly use the same unknown kid or varying kid values absent from the cached JWKS. As a result, each cache miss causes PyJWKClient to refresh the JWKS. Consequently, attacker traffic can amplify outbound requests to the configured JWKS endpoint. This issue is fixed in version 2.14.0.","state":0,"publishedAt":"2026-09-28T20:07:44.237+00:00","modifiedAt":"2026-09-28T20:35:25.908+00:00","affected":[{"ecosystem":"Vendor product","name":"pyjwt","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"jpadilla\",\n                    \"product\": \"pyjwt\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 2.14.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/jpadilla/pyjwt/security/advisories/GHSA-2gx3-rcp4-g85q","https://github.com/jpadilla/pyjwt/commit/ba4853a75fb9676362da17f67d0f64bd18afd4e1","https://github.com/jpadilla/pyjwt/releases/tag/2.14.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-101917","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-101917","identifiers":["CVE-2026-101917"]},"retained":false,"historicalAffected":[]}],"coverage":[]}