Is this vulnerability remotely exploitable over the internet?

Yes, if authentik's SAML endpoints are exposed and an attacker can send or influence SAML responses (for example, by controlling a SAML IdP or performing a man-in-the-middle attack), they can attempt to exploit this issue remotely under the affected configurations.

Does an attacker need valid user credentials or prior access to exploit this?

Not necessarily. The attacker primarily needs the ability to inject or craft SAML responses that authentik will accept. This can be achieved by operating a malicious IdP, compromising a legitimate IdP, or interfering with the SAML exchange. Valid user credentials are not required if the attacker can forge acceptable assertions.

What is the safest general fix pattern for this type of issue?

Ensure that SAML processing strictly validates cryptographic signatures on the exact assertion used for authentication and, where applicable, the overall response. Enable both response and assertion signature verification, enforce correct key usage, and reject any responses containing multiple or unexpected assertions that are not fully validated.

Severity:

HIGH RISK

(8.8)

SAML Assertion Injection via Incomplete Signature Validation (CWE-347) in authentik SAML Source

CVE-2026-25922

Published:

Feb 12, 2026

Status:

Undergoing Analysis

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-306

CRITICAL RISK

CRITICAL

(9.8)

Missing Authentication for Forgot-Password Email Change API (CWE-306)

Account Takeover / Loss of Account Control

February 17, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in node-sonos-http-api TTS Provider for macOS

Remote Code Execution on the Server Host

February 17, 2026

Vulnerability Type

Category:

Authentication and Signature Validation Weakness

CWE:

CWE-287;CWE-347

Impact:

Authentication Bypass / Account Impersonation

Severity:

HIGH RISK

(8.8)

CVSS Version:

3.1

Vulnerability Type

Category:

Authentication and Signature Validation Weakness

CWE:

CWE-287;CWE-347

Impact:

Authentication Bypass / Account Impersonation

Severity:

HIGH RISK

(8.8)

CVSS Version:

3.1

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SAML Assertion Injection via Incomplete Signature Validation (CWE-347) in authentik SAML Source

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

CRITICAL RISK

CRITICAL

(9.8)

Missing Authentication for Forgot-Password Email Change API (CWE-306)

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in node-sonos-http-api TTS Provider for macOS

Vulnerability Type

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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