{"id":"CVE-2026-45069","aliases":["GHSA-29fc-p6c4-24cg"],"url":"https://o3.security/vulnerability/CVE-2026-45069","summary":"Symfony: OidcTokenHandler Accepts JWTs Missing aud/iss/exp Claims","details":"### Description\n\n`OidcTokenHandler` is Symfony's built-in access-token handler for OpenID Connect: it validates a bearer JWT and returns the authenticated user identity. It delegates claim validation to the `web-token/jwt-checker` library's `ClaimCheckerManager`.\n\n`OidcTokenHandler::verifyClaims()` registers audience (`aud`), issuer (`iss`), and expiry (`exp`) checkers, but never passes the `$mandatoryClaims` argument to `ClaimCheckerManager::check()`. That method only validates claims that are *present* in the token: a checker for an absent claim is silently skipped. A validly-signed JWT that simply **omits** `aud`, `iss`, and `exp` therefore passes verification.\n\n### Resolution\n\nThe `OidcTokenHandler` now calls the `ClaimCheckerManager` with the list of mandatory claims so that tokens missing `aud`, `iss`, or `exp` are rejected.\n\nThe patch for this issue is available [here](https://github.com/symfony/symfony/commit/6b717aaac21b7e96798448d14c4355ea87690b3d) for branch 6.4.\n\n### Credits\n\nSymfony would like to thank Claude Mythos Preview (via Project Glasswing) for reporting the issue and providing the fix.","published":"2026-07-14T18:46:54.011Z","modified":"2026-08-12T03:51:09.467079706Z","cvss":null,"epss":{"score":0.00258,"percentile":0.17715,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"symfony/security-http","fixedVersion":"6.4.40"},{"ecosystem":"Packagist","name":"symfony/security-http","fixedVersion":"7.4.12"},{"ecosystem":"Packagist","name":"symfony/security-http","fixedVersion":"8.0.12"},{"ecosystem":"Packagist","name":"symfony/symfony","fixedVersion":"6.4.40"},{"ecosystem":"Packagist","name":"symfony/symfony","fixedVersion":"7.4.12"},{"ecosystem":"Packagist","name":"symfony/symfony","fixedVersion":"8.0.12"}],"fix":{"url":"https://github.com/symfony/symfony/commit/6b717aaac21b7e96798448d14c4355ea87690b3d","label":"symfony/symfony@6b717aa"},"references":[{"type":"WEB","url":"https://github.com/symfony/symfony/releases/tag/v6.4.40"},{"type":"WEB","url":"https://github.com/symfony/symfony/releases/tag/v7.4.12"},{"type":"WEB","url":"https://github.com/symfony/symfony/releases/tag/v8.0.12"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45069.json"},{"type":"ADVISORY","url":"https://github.com/symfony/symfony/security/advisories/GHSA-29fc-p6c4-24cg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45069"},{"type":"WEB","url":"https://github.com/symfony/symfony/commit/6b717aaac21b7e96798448d14c4355ea87690b3d"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-http/CVE-2026-45069.yaml"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2026-45069.yaml"},{"type":"PACKAGE","url":"https://github.com/symfony/symfony"},{"type":"WEB","url":"https://symfony.com/cve-2026-45069"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:09.467079706Z"}}