How serious is CVE-2026-25748?

This vulnerability has a CVSS score of 7.5 out of 10, classified as HIGH severity. Proof-of-concept exploit code is publicly available, making this an active threat.

Is there exploit code available for CVE-2026-25748?

Yes, proof-of-concept exploit code for CVE-2026-25748 is publicly available on GitHub and security research platforms. This increases the risk of active exploitation.

Which products are affected by CVE-2026-25748?

CVE-2026-25748 affects goauthentik authentik. Check the full CVE details for specific version information.

How do I fix CVE-2026-25748?

To remediate CVE-2026-25748, check for security patches from goauthentik. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2026-25748

High

|7.5

Exploit Available

Plain English Summary

AI-powered analysis for quick understanding

This vulnerability allows an attacker to bypass authentication and gain unauthorized access to systems using the authentik identity provider when it is set up with certain reverse proxies like Traefik or Caddy. This can happen if the attacker sends a specially crafted cookie, allowing them to access resources without proper credentials, but it only affects versions prior to the specified updates.

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.

CVSS Vector Analysis

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

Confidentiality ImpactHigh

Integrity ImpactNone

Availability ImpactNone

ScopeUnchanged

Vector String

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

Exploit Resources

Search for proof-of-concept code and exploit modules

GitHub Search Exploit-DB Nuclei Templates Metasploit Vulners

Official References

NIST NVD

Est. Bounty

$2,053($1K-$5K)

Vendor Response

Grade APatched in 6 days

Quick Information

Published

Feb 12, 2026

8 days ago

Last Modified

Feb 19, 2026

1 day ago

Vendor

goauthentik

Product

authentik

Related Vulnerabilities

CVE-2026-25922High

An attacker can inject a harmful authentication message into the authentik identity provider, potentially allowing them to impersonate a legitimate user. This can happen if the system is configured to verify the signature of the assertion but not the response, or if it lacks proper encryption settings.

CVE-2026-25227High

This vulnerability allows an attacker with specific permissions to run arbitrary code on the authentik server, potentially taking control of the system. It affects versions from 2021.3.1 up to just before 2025.8.6, 2025.10.4, and 2025.12.4, and requires the attacker to have permission to view certain property mappings or policies.