{"id":"GHSA-f3r2-88mq-9v4g","aliases":[],"url":"https://o3.security/vulnerability/GHSA-f3r2-88mq-9v4g","summary":"Auth0 Symfony SDK has Improper Audience Validation via Auth0-PHP SDK","details":"### Description\nIn applications built with the Auth0-PHP SDK, the audience validation in access tokens is performed improperly. Without proper validation, affected applications may accept ID tokens as Access tokens.\n\n### Affected product and versions\nProjects are affected if they meet the following preconditions:\n\n- Applications using the Auth0 Symfony SDK with versions between 5.0.0 and 5.5.0\n- Auth0 Symfony SDK uses the Auth0-PHP SDK with versions between 8.0.0 and 8.17.0.\n\n### Resolution\nUpgrade Auth0/symfony to version 5.6.0 or greater.\n\n### Acknowledgement\nOkta would like to thank Jafar Sadiq (iaf4r) for their discovery and responsible disclosure.","published":"2025-12-17T20:56:37Z","modified":"2026-02-04T04:20:53.842098Z","cvss":{"score":6.8,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"auth0/symfony","fixedVersion":"5.6.0"}],"fix":{"url":"https://github.com/auth0/symfony/commit/0103d6f8dcef6996653fad1f823d1c167f472479","label":"auth0/symfony@0103d6f"},"references":[{"type":"WEB","url":"https://github.com/auth0/symfony/security/advisories/GHSA-f3r2-88mq-9v4g"},{"type":"WEB","url":"https://github.com/auth0/symfony/commit/0103d6f8dcef6996653fad1f823d1c167f472479"},{"type":"PACKAGE","url":"https://github.com/auth0/symfony"},{"type":"WEB","url":"https://github.com/auth0/symfony/releases/tag/5.6.0"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-02-04T04:20:53.842098Z"}}