CVE-2026-126129

Published Nov 10, 2026 CWE-287 CWE-807 CWE-1254

Description

The Auth0 ASP.NET Core Authentication SDK incorrectly determines a session's OIDC Back-Channel Logout status, which may result in a logged-out session being accepted for access to protected endpoints.

Is your site exposed to CVE-2026-126129?

Run a free security scan — no signup, results in seconds.

Weakness Type (CWE)

CWE-287 Improper Authentication
CWE-807 CWE-807
CWE-1254 CWE-1254

References

Frequently Asked Questions

What is CVE-2026-126129? +
The Auth0 ASP.NET Core Authentication SDK incorrectly determines a session's OIDC Back-Channel Logout status, which may result in a logged-out session being accepted for access to protected endpoints.
How do I check if I'm vulnerable to CVE-2026-126129? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

Don't wait for an exploit

Scan your website for vulnerabilities like CVE-2026-126129 — free, no signup required.

Patch on a server you control

Spin up a fresh, up-to-date VPS to test or deploy the fix.

Compare VPS prices →

Affiliate links: we may earn a commission, your price stays the same.