{"id":"GHSA-f3r2-88mq-9v4g","aliases":[],"title":"Auth0 Symfony SDK has Improper Audience Validation via Auth0-PHP SDK","description":"### 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.","severity":"medium","score":6.8,"published":"2025-12-17T20:56:37.000Z","modified":"2026-02-04T04:20:53.842Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"auth0/symfony","ranges":[{"events":[{"introduced":"5.0.0"},{"fixed":"5.6.0"}],"type":"ECOSYSTEM"}],"versions":["5.0.0","5.1.0","5.2.0","5.2.1","5.2.2","5.2.3","5.3.0","5.3.1","5.4.0","5.4.1","5.5.0"],"fixed":["5.6.0"]}],"references":["https://github.com/auth0/symfony/security/advisories/GHSA-f3r2-88mq-9v4g","https://github.com/auth0/symfony/commit/0103d6f8dcef6996653fad1f823d1c167f472479","https://github.com/auth0/symfony","https://github.com/auth0/symfony/releases/tag/5.6.0"],"sources":[{"name":"OSV","id":"GHSA-f3r2-88mq-9v4g","modified":"2026-02-04T04:20:53.842098Z","url":"https://osv.dev/vulnerability/GHSA-f3r2-88mq-9v4g"}],"assessments":[{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","score":6.8}]}