ByteOS Network

NVD Vulnerability Details :

CVE-2026-25748

Received

Source-security-advisories@github.com

Published At-12 Feb, 2026 | 20:16

Updated At-12 Feb, 2026 | 20:16

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.

Date Added	Due Date	Vulnerability Name	Required Action
	N/A

Metrics

Type	Version	Base score	Base severity	Vector
Secondary	3.1	8.6	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Type: Secondary

Version: 3.1

Base score: 8.6

Base severity: HIGH

Vector:

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

Weaknesses

CWE ID	Type	Source
CWE-287	Primary	security-advisories@github.com

CWE ID: CWE-287

Type: Primary

Source: security-advisories@github.com

References

Hyperlink	Source	Resource
https://github.com/goauthentik/authentik/releases/tag/version%2F2025.10.4	security-advisories@github.com	N/A
https://github.com/goauthentik/authentik/releases/tag/version%2F2025.12.4	security-advisories@github.com	N/A
https://github.com/goauthentik/authentik/security/advisories/GHSA-fj56-5763-j8pp	security-advisories@github.com	N/A