CVE-2026-34236
High
Description
Auth0-PHP is a PHP SDK for Auth0 Authentication and Management APIs. From version 8.0.0 to before version 8.19.0, 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. This issue has been patched in version 8.19.0.
SeverityHigh
CVSS8.2
Exploit probability—
Product
Auth0-php
PublishedApr 1, 2026
First seenApr 1, 2026
Weakness typeCWE-331CWE-331
How to fix
Update
- auth0 auth0-php8.19.0 or later
- auth0/auth0-php8.19.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| auth0 auth0-php | 8.0.0 ≤ v < 8.19.0 | 8.19.0 |
| auth0/auth0-phpPackagist | 8.0.0 ≤ v < 8.19.0 | 8.19.0 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.