{"id":"CVE-2026-34236","aliases":["GHSA-w3wc-44p4-m4j7"],"url":"https://o3.security/vulnerability/CVE-2026-34236","summary":"Auth0 PHP SDK Insufficient Entropy in Cookie Encryption","details":"### Impact\nIn applications built with the Auth0 PHP SDK, cookies are encrypted with insufficient entropy, which may result in threat actors brute-forcing the encryption key and forging session cookies.\n\n### Am I Affected?\nConsumers are affected if their application meets the following preconditions:\n- Their application is using the Auth0-PHP SDK, versions between 8.0.0 and 8.18.0\n- Their application is using the Auth0-PHP SDK, or the following SDKs that rely on the Auth0-PHP SDK:\n    - Auth0/symfony,\n    - Auth0/laravel0-auth0, or\n    - Auth0/wordpress\n\n### Resolution\nUpgrade Auth0/Auth0-PHP to version 8.19.0 or greater.","published":"2026-04-01T17:04:53.378Z","modified":"2026-10-28T02:30:49.533671788Z","cvss":{"score":8.2,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N"},"epss":{"score":0.00221,"percentile":0.12805,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"auth0/auth0-php","fixedVersion":"8.19.0"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/auth0/auth0-PHP/releases/tag/8.19.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34236.json"},{"type":"ADVISORY","url":"https://github.com/auth0/auth0-PHP/security/advisories/GHSA-w3wc-44p4-m4j7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34236"},{"type":"PACKAGE","url":"https://github.com/auth0/auth0-PHP"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:30:49.533671788Z"}}