CVE-2026-25748

Name: CVE-2026-25748
Creator: NVD / NIST
Published: 2026-02-12T20:16:10.473+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.48%

Last modified Jun 17, 2026

CVE-2026-25748 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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 with Traefik or Caddy as reverse proxy. EPSS estimates a 0.48% chance of exploitation in the next 30 days.

Description

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 with Traefik or Caddy as reverse proxy. When a malicious cookie was used, none of the authentik-specific X-Authentik-* headers were set which depending on application can grant access to an attacker. authentik 2025.10.4 and 2025.12.4 fix this issue.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.48%

37.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Goauthentik	Authentik	< 2025.10.4
Goauthentik	Authentik	>= 2025.12.0, < 2025.12.4

References

https://github.com/goauthentik/authentik/releases/tag/version%2F2025.10.4Product, Release Notes
https://github.com/goauthentik/authentik/releases/tag/version%2F2025.12.4Product, Release Notes
https://github.com/goauthentik/authentik/security/advisories/GHSA-fj56-5763-j8ppVendor Advisory

Timeline

Published: Feb 12, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-25748?

How severe is CVE-2026-25748?

CVE-2026-25748 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.48% probability of exploitation in the next 30 days.

How do I fix CVE-2026-25748?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-25748?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST