What is CVE-2026-25748?

CVE-2026-25748 is a high-severity vulnerability in Goauthentik Authentik, classified under Improper Authentication. CVSS score: 8.6/10. Published 2026-02-12.

How severe is CVE-2026-25748?

High severity. CVSS v3 base score is 8.6 out of 10.

Auth bypass in Goauthentik Authentik

CVE-2026-25748

authentik is an open-source identity provider. Prior to 2025.10.4 and 2025.12.4, with a malformed cookie it was possible to bypass authentication when using forward authentication in the authentik Proxy Provider when used in conjunction wi…

Vulnerability class: Broken Authentication

EPSS: 0.001 (18.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.

Affected products

Goauthentik Authentik — versions >= 2025.10.0-rc1, < 2025.10.4, >= 2025.10.0-rc1, < 2025.12.4

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

https://github.com/goauthentik/authentik/security/advisories/GHSA-fj56-5763-j8pp (x_refsource_CONFIRM)
https://github.com/goauthentik/authentik/releases/tag/version%2F2025.10.4 (x_refsource_MISC)
https://github.com/goauthentik/authentik/releases/tag/version%2F2025.12.4 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-25748?: CVE-2026-25748 is a high-severity vulnerability in Goauthentik Authentik, classified under Improper Authentication. CVSS score: 8.6/10. Published 2026-02-12.
How severe is CVE-2026-25748?: High severity. CVSS v3 base score is 8.6 out of 10.