{"id":"CVE-2026-89317","aliases":["EUVD-2026-108649","GHSA-445r-fpvv-hgwc"],"status":"published","title":"JwtVerifierImpl.Verify does not enforce the JWS `crit` header (RFC 7515 §4.1.11)","description":"gose parsed the JWS `crit` header into `JwsHeader.Crit` and then never read it. RFC 7515 §4.1.11 requires a recipient to reject a JWS whose listed critical extension parameters it does not understand. gose implements no header extensions, so every token carrying a non-empty `crit` should have been rejected — and none were.","severity":{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00217,"percentile":0.12237,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1288","CWE-20","CWE-347"],"published":"2026-10-23T08:50:22Z","modified":"2026-11-04T02:31:01Z","products":[{"vendor":"eclipse foundation","product":"eclipse keypont - gose"}],"references":[{"url":"https://github.com/eclipse-keypont/gose/security/advisories/GHSA-445r-fpvv-hgwc","tags":["exploit","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89317.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89317","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-89317","title":"JwtVerifierImpl.Verify does not enforce the JWS `crit` header (RFC 7515 §4.1.11)","description":"gose parsed the JWS `crit` header into `JwsHeader.Crit` and then never read it. RFC 7515 §4.1.11 requires a recipient to reject a JWS whose listed critical extension parameters it does not understand. gose implements no header extensions, so every token carrying a non-empty `crit` should have been rejected — and none were.","status":"published","published":"2026-10-23T08:50:22.987Z","modified":"2026-11-02T13:17:29.417Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-20","CWE-347","CWE-1288"],"updated_at":"2026-11-02T18:00:08.034842Z"}],"euvd":[{"id":"EUVD-2026-108649","description":"gose parsed the JWS `crit` header into `JwsHeader.Crit` and then never read it. RFC 7515 §4.1.11 requires a recipient to reject a JWS whose listed critical extension parameters it does not understand. gose implements no header extensions, so every token carrying a non-empty `crit` should have been rejected — and none were.","status":"published","published":"2026-10-23T08:50:22Z","modified":"2026-11-02T13:17:29Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:58:45.728338Z"}],"nvd":[{"id":"CVE-2026-89317","description":"gose parsed the JWS `crit` header into `JwsHeader.Crit` and then never read it. RFC 7515 §4.1.11 requires a recipient to reject a JWS whose listed critical extension parameters it does not understand. gose implements no header extensions, so every token carrying a non-empty `crit` should have been rejected — and none were.","status":"published","published":"2026-10-23T09:17:08.26Z","modified":"2026-11-02T14:17:40.403Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-20","CWE-347","CWE-1288"],"updated_at":"2026-11-02T20:51:42.579129Z"}],"osv":[{"id":"CVE-2026-89317","title":"JwtVerifierImpl.Verify does not enforce the JWS `crit` header (RFC 7515 §4.1.11)","description":"gose parsed the JWS `crit` header into `JwsHeader.Crit` and then never read it. RFC 7515 §4.1.11 requires a recipient to reject a JWS whose listed critical extension parameters it does not understand. gose implements no header extensions, so every token carrying a non-empty `crit` should have been rejected — and none were.","status":"published","published":"2026-10-23T08:50:22.987Z","modified":"2026-11-04T02:31:01.176313252Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-1288","CWE-20","CWE-347"],"updated_at":"2026-11-04T02:54:44.889498Z"}]}}