CVE-2026-25922
February 12, 2026
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.
Affected Packages
https://github.com/goauthentik/authentik.git (GITHUB):
Affected version(s) >=version/2025.12.0 <version/2025.12.4Fix Suggestion:
Update to version version/2025.12.4https://github.com/goauthentik/authentik.git (GITHUB):
Affected version(s) >=version/2025.8.0 <version/2025.8.6Fix Suggestion:
Update to version version/2025.8.6https://github.com/goauthentik/authentik.git (GITHUB):
Affected version(s) >=version/2025.10.0 <version/2025.10.4Fix Suggestion:
Update to version version/2025.10.4Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
EPSS
Base Score:
0.01
