CVE-2026-25748— authentik has a forward authentication bypass with broken cookie
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I. Basic Information for CVE-2026-25748
Vulnerability Information
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Vulnerability Title
authentik has a forward authentication bypass with broken cookie
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
认证机制不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
authentik 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
authentik是authentik开源的一个开源身份提供应用程序。 authentik 2025.10.4之前版本和2025.12.4之前版本存在授权问题漏洞，该漏洞源于使用畸形Cookie时可能绕过身份验证，可能导致攻击者获得访问权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| goauthentik | authentik | >= 2025.10.0-rc1, < 2025.10.4 | - |
II. Public POCs for CVE-2026-25748
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · goauthentik · 2026-02-12 · 3 CVEs total
| CVE-2026-25227 | 9.1 CRITICAL | authentik affected by Remote Code Execution via Context Key Injection in PropertyMapping T |
| CVE-2026-25922 | 8.8 HIGH | authentik has a Signature Verification Bypass via SAML Assertion Wrapping |
IV. Related Vulnerabilities
Same product: authentik
- CVE-2026-25922
authentik has a Signature Verification Bypass via SAML Asser - CVE-2026-25227
authentik affected by Remote Code Execution via Context Key - CVE-2025-64708
authentik invitation expiry is delayed by at least 5 minutes - CVE-2025-64521
authentik deactivated service accounts can authenticate to O - CVE-2025-53942
authentik has an insufficient check for account active statu
Same vendor: goauthentik
- CVE-2026-25922
authentik has a Signature Verification Bypass via SAML Asser - CVE-2026-25227
authentik affected by Remote Code Execution via Context Key - CVE-2025-64708
authentik invitation expiry is delayed by at least 5 minutes - CVE-2025-64521
authentik deactivated service accounts can authenticate to O - CVE-2025-53942
authentik has an insufficient check for account active statu
Same weakness: CWE-287
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