Vulnerability in Auth0 Auth0-Php
CVE-2026-34236
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (22.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 22.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Auth0 Auth0-Php — versions >= 8.0.0, < 8.19.0
Weakness classification (CWE)
References
- github.com/auth0/auth0-PHP/security/advisories/GHSA-w3wc-44p4-m4j7 (Vendor Advisory)
- github.com/auth0/auth0-PHP/releases/tag/8.19.0 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-34236?
- CVE-2026-34236 is a high-severity vulnerability in Auth0 Auth0-Php, classified under Insufficient Entropy. CVSS score: 8.2/10. Published 2026-04-01.
- How severe is CVE-2026-34236?
- High severity. CVSS v3 base score is 8.2 out of 10.