GHSA-w3wc-44p4-m4j7 (CVE-2026-34236)

Details

Impact

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.

Am I Affected?

Consumers are affected if their application meets the following preconditions:

Their application is using the Auth0-PHP SDK, versions between 8.0.0 and 8.18.0
Their application is using the Auth0-PHP SDK, or the following SDKs that rely on the Auth0-PHP SDK:
- Auth0/symfony,
- Auth0/laravel0-auth0, or
- Auth0/wordpress

Resolution

Upgrade Auth0/Auth0-PHP to version 8.19.0 or greater.

Affected Packages

auth0/auth0-php

Packagist

Fixed in:

8.19.0

References

ADVISORY

https://github.com/advisories/GHSA-w3wc-44p4-m4j7

PACKAGE

https://github.com/auth0/auth0-PHP

WEB

https://github.com/auth0/auth0-PHP/releases/tag/8.19.0

WEB

https://github.com/auth0/auth0-PHP/security/advisories/GHSA-w3wc-44p4-m4j7

ADVISORY

https://nvd.nist.gov/vuln/detail/CVE-2026-34236