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CVE-2026-25748

8.6 · HIGH

authentik is an open-source identity provider.

Published Feb 12, 2026CWE-287EPSS 0.86%

Overview

CVE-2026-25748 is a high-severity vulnerability. It was published on February 12, 2026 and has a CVSS 3.1 base score of 8.6 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/goauthentik/authentik/releases/tag/version%2F2025.10.4GitHubgithub.com/goauthentik/authentik/releases/tag/version%2F2025.12.4GitHubgithub.com/goauthentik/authentik/security/advisories/GHSA-fj56-5763-j8pp

How CyberStrike helps

Frequently asked questions

What is CVE-2026-25748?

CVE-2026-25748 is a high-severity vulnerability. It was published on February 12, 2026 and has a CVSS 3.1 base score of 8.6 (HIGH).

How severe is CVE-2026-25748?

This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-25748?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-25748?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-25748 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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