Insufficient Entropy in Cookie Encryption in Auth0 Symfony SDK CVE-2026-34236 - Apr 1, 2026
Description
In 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.
Affected versions
You are affected if you meet the following preconditions:
Applications using the Auth0 Symfony SDK, versions between 5.0.0 and 5.7.0
Auth0 Symfony SDK using the Auth0-PHP SDK versions between 8.0.0 to 8.18.0.
Resolution
Upgrade Auth0/symfony-auth0 to version 5.8.0 or greater.
CVE ID | |
Published Date | 2026-04-01 |
Vulnerability Type | Insufficient Entropy in Cookie Encryption |
CWE | CWE-331 - Insufficient Entropy |
CVSS v3 | Score: 8.2 Vector string: https://www.first.org/cvss/calculator/3-1#CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N |
References
Insufficient Entropy in Cookie Encryption in Auth0 Symfony SDK