{"schema_version":"1.9.0","id":"CVE-2026-48526","published":"2026-05-28T15:09:09.258Z","modified":"2026-09-11T03:30:52.623966404Z","aliases":["GHSA-xgmm-8j9v-c9wx","PYSEC-2026-179"],"related":["ALSA-2026:25902","ALSA-2026:26206","SUSE-SU-2026:22138-1","SUSE-SU-2026:22170-1","SUSE-SU-2026:22220-1","SUSE-SU-2026:22238-1","SUSE-SU-2026:2626-1","SUSE-SU-2026:2627-1","openSUSE-SU-2026:11024-1","openSUSE-SU-2026:21095-1"],"summary":"PyJWT: Public-key JWK accepted as HMAC secret enables forged HS256 tokens when mixed families are allowed","details":"PyJWT is a JSON Web Token implementation in Python. Prior to 2.13.0, when the verifier is decoding JSON Web Tokens, while supporting both asymmetric and HMAC algorithms, the library does not validate use of JSON Web Keys in HMAC algorithm, allowing attacker to use the issuer public key as the secret key for HMAC algorithm. This vulnerability is fixed in 2.13.0.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/jpadilla/pyjwt","events":[{"introduced":"0"},{"fixed":"7144e4534c34810f4525dc4578a32addd8212cff"}],"database_specific":{"cpe":"cpe:2.3:a:pyjwt_project:pyjwt:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"2.13.0"}],"source":["AFFECTED_FIELD","CPE_RANGE"]}}],"versions":["2.12.1","2.12.0","2.11.0","2.10.1","2.10.0","2.9.0","2.8.0","2.7.0","2.6.0","2.5.0","2.4.0","2.3.0","2.2.0","2.1.0","2.0.1","2.0.0","2.0.0a2","2.0.0a1","1.7.1","1.7.0","1.6.4","1.6.3","1.6.1","1.6.0","1.5.3","1.5.2","1.5.1","1.5.0","1.4.2","1.4.1","1.4.0","1.3.0","1.2.0","1.1.0","1.0.1","1.0.0","0.4.3","0.4.2","0.4.1","0.4.0","0.3.2","0.3.1","0.3.0","0.2.3","0.2.2","0.2.0","0.1.9","0.1.6"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-48526.json"}}],"references":[{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48526.json"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:25902"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:25928"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:26206"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:28571"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:30076"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:30088"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:30089"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:33683"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:34160"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:34365"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:34374"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:35835"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:35836"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:35837"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:35845"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36350"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:37275"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:40967"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:41066"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:42132"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:42142"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:42144"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:42644"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:42796"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:43038"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:48085"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:50222"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:50223"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:50263"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:50319"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:50336"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:50340"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:50904"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:60520"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-48526"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48526.json"},{"type":"ADVISORY","url":"https://github.com/jpadilla/pyjwt/security/advisories/GHSA-xgmm-8j9v-c9wx"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48526"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2482734"}],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-287","CWE-347"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48526.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"}]}