CVE-2026-25922Network attack vector

Authenticated user impersonation via SAML assertion wrapping

Published Feb 12, 2026 · Updated Feb 12, 2026

Improper signature verification in authentik SAML Sources allows remote authenticated users to impersonate any existing user. SAML Source processing accepts an attacker-injected unsigned assertion placed before the signed assertion and uses it instead of binding authentication to the verified assertion. Exposure requires assertion verification without response verification, or a source lacking an encryption certificate; the resulting session has the targeted user's access.

CVSS severity8.8
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper signature verification in authentik SAML Sources allows remote authenticated users to impersonate any existing user. SAML Source processing accepts an attacker-injected unsigned assertion placed before the signed assertion and uses it instead of binding authentication to the verified assertion. Exposure requires assertion verification without response verification, or a source lacking an encryption certificate; the resulting session has the targeted user's access.

The record

CVE
CVE-2026-25922
Published
Feb 12, 2026
Updated
Feb 12, 2026
Vendor
Authentik Security Inc.
Product
authentik
Classifications
CWE-347, CWE-287, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 2025.10.0-rc1, < 2025.10.4
  2. Affected versionversion=>= 2025.10.0-rc1, < 2025.12.4
  3. Affected versionversion=< 2025.8.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Authentik Security Inc. · authentikversion=>= 2025.10.0-rc1, < 2025.10.4; version=>= 2025.10.0-rc1, < 2025.12.4; version=< 2025.8.6

Published CVSS scores

8.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-347Improper Verification of Cryptographic Signature
CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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