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CVE-2026-25922— authentik has a Signature Verification Bypass via SAML Assertion Wrapping

Quick assessment

Affected
goauthentik authentik
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

authentik是authentik开源的一个开源身份提供应用程序。 authentik 2025.8.6之前版本、2025.10.4之前版本和2025.12.4之前版本存在数据伪造问题漏洞，该漏洞源于使用特定配置的SAML源时，攻击者可能注入恶意断言。

CVSS 8.8 · High EPSS 0.31% · P22

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-25922

Vulnerability Information
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Vulnerability Title
authentik has a Signature Verification Bypass via SAML Assertion Wrapping
Source: CVE Program / CVE List V5
Vulnerability Description
authentik is an open-source identity provider. Prior to 2025.8.6, 2025.10.4, and 2025.12.4, when using a SAML Source that has the option Verify Assertion Signature under Verification Certificate enabled and not Verify Response Signature, or does not have the Encryption Certificate setting under Advanced Protocol settings configured, it was possible for an attacker to inject a malicious assertion before the signed assertion that authentik would use instead. authentik 2025.8.6, 2025.10.4, and 2025.12.4 fix this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
authentik 数据伪造问题漏洞
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 2025.8.6之前版本、2025.10.4之前版本和2025.12.4之前版本存在数据伪造问题漏洞，该漏洞源于使用特定配置的SAML源时，攻击者可能注入恶意断言。
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 < 2025.8.6 -

II. Public POCs for CVE-2026-25922

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III. Intelligence Information for CVE-2026-25922

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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-2026-25748 8.6 HIGH authentik has a forward authentication bypass with broken cookie

IV. Related Vulnerabilities

Same product: authentik
Same vendor: goauthentik
Same weakness: CWE-287

V. Comments for CVE-2026-25922

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