{"id":"CVE-2026-56664","aliases":["GHSA-wxg7-w2v3-w38g","GO-2026-5732"],"url":"https://o3.security/vulnerability/CVE-2026-56664","summary":"ZITADEL: Missing Token Lifecyle Validation (`exp` and `iat`) in JWT IdP Provider","details":"ZITADEL is an open source identity management platform. Prior to 3.4.12 and 4.15.2, ZITADEL's external JWT Identity Provider validation in internal/idp/providers/jwt/session.go skips the maximum token age freshness check when an incoming token omits the iat claim, allowing arbitrarily old tokens from a trusted issuer to pass authentication. This issue is fixed in versions 3.4.12 and 4.15.2.","published":"2026-07-10T17:21:22.653Z","modified":"2026-08-12T03:51:41.087858519Z","cvss":{"score":4.2,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N"},"epss":{"score":0.00318,"percentile":0.24607,"asOf":"2026-09-13"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/zitadel/zitadel","fixedVersion":"1.80.0-v2.20.0.20260615122908-fad02c6d9f45"}],"fix":{"url":"https://github.com/zitadel/zitadel/commit/4925fab849d39a88674485d937b79e54318b48a8","label":"zitadel/zitadel@4925fab"},"references":[{"type":"WEB","url":"https://github.com/zitadel/zitadel/releases/tag/v3.4.12"},{"type":"WEB","url":"https://github.com/zitadel/zitadel/releases/tag/v4.15.2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56664.json"},{"type":"ADVISORY","url":"https://github.com/zitadel/zitadel/security/advisories/GHSA-wxg7-w2v3-w38g"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56664"},{"type":"FIX","url":"https://github.com/zitadel/zitadel/commit/4925fab849d39a88674485d937b79e54318b48a8"},{"type":"FIX","url":"https://github.com/zitadel/zitadel/commit/d1c3aa84af8fcb0f33910ada30b866f4afb551ac"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:41.087858519Z"}}