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8.8
HIGH CVSS 3.1
CVE-2026-25922
authentik has a Signature Verification Bypass via SAML Assertion Wrapping
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.

INFO

Published Date :

Feb. 12, 2026, 8:16 p.m.

Last Modified :

Feb. 18, 2026, 8:59 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2026-25922 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Goauthentik authentik
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH [email protected]
CVSS 3.1 HIGH MITRE-CVE
Solution
Update authentik to a patched version to fix SAML assertion injection vulnerability.
  • Update authentik to version 2025.8.6 or later.
  • Update authentik to version 2025.10.4 or later.
  • Update authentik to version 2025.12.4 or later.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-25922.

URL Resource
https://github.com/goauthentik/authentik/releases/tag/version%2F2025.10.4 Product Release Notes
https://github.com/goauthentik/authentik/releases/tag/version%2F2025.12.4 Product Release Notes
https://github.com/goauthentik/authentik/releases/tag/version%2F2025.8.6 Product Release Notes
https://github.com/goauthentik/authentik/security/advisories/GHSA-jh35-c4cc-wjm4 Mitigation Vendor Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-25922 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-25922 weaknesses.

CAPEC-22: Exploiting Trust in Client Exploiting Trust in Client CAPEC-57: Utilizing REST's Trust in the System Resource to Obtain Sensitive Data Utilizing REST's Trust in the System Resource to Obtain Sensitive Data CAPEC-94: Adversary in the Middle (AiTM) Adversary in the Middle (AiTM) CAPEC-114: Authentication Abuse Authentication Abuse CAPEC-115: Authentication Bypass Authentication Bypass CAPEC-151: Identity Spoofing Identity Spoofing CAPEC-194: Fake the Source of Data Fake the Source of Data CAPEC-593: Session Hijacking Session Hijacking CAPEC-633: Token Impersonation Token Impersonation CAPEC-650: Upload a Web Shell to a Web Server Upload a Web Shell to a Web Server CAPEC-463: Padding Oracle Crypto Attack Padding Oracle Crypto Attack CAPEC-475: Signature Spoofing by Improper Validation Signature Spoofing by Improper Validation

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-25922 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-25922 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Feb. 18, 2026

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:* versions up to (excluding) 2025.8.6 *cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:* versions from (including) 2025.10.0 up to (excluding) 2025.10.4 *cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:* versions from (including) 2025.12.0 up to (excluding) 2025.12.4
    Added Reference Type GitHub, Inc.: https://github.com/goauthentik/authentik/releases/tag/version%2F2025.10.4 Types: Product, Release Notes
    Added Reference Type GitHub, Inc.: https://github.com/goauthentik/authentik/releases/tag/version%2F2025.12.4 Types: Product, Release Notes
    Added Reference Type GitHub, Inc.: https://github.com/goauthentik/authentik/releases/tag/version%2F2025.8.6 Types: Product, Release Notes
    Added Reference Type GitHub, Inc.: https://github.com/goauthentik/authentik/security/advisories/GHSA-jh35-c4cc-wjm4 Types: Mitigation, Vendor Advisory
  • New CVE Received by [email protected]

    Feb. 12, 2026

    Action Type Old Value New Value
    Added 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.
    Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Added CWE CWE-287
    Added CWE CWE-347
    Added Reference https://github.com/goauthentik/authentik/releases/tag/version%2F2025.10.4
    Added Reference https://github.com/goauthentik/authentik/releases/tag/version%2F2025.12.4
    Added Reference https://github.com/goauthentik/authentik/releases/tag/version%2F2025.8.6
    Added Reference https://github.com/goauthentik/authentik/security/advisories/GHSA-jh35-c4cc-wjm4
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 8.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact