Auth bypass in Goauthentik Authentik
CVE-2026-25922
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (25.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 25.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Goauthentik Authentik — versions < 2025.8.6, >= 2025.10.0-rc1, < 2025.10.4, >= 2025.10.0-rc1, < 2025.12.4
Weakness classification (CWE)
References
- github.com/goauthentik/authentik/security/advisories/GHSA-jh35-c4cc-wjm4 (Mitigation, Vendor Advisory)
- github.com/goauthentik/authentik/releases/tag/version/2025.10.4 (Product, Release Notes)
- github.com/goauthentik/authentik/releases/tag/version/2025.12.4 (Product, Release Notes)
- github.com/goauthentik/authentik/releases/tag/version/2025.8.6 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-25922?
- CVE-2026-25922 is a high-severity vulnerability in Goauthentik Authentik, classified under Improper Authentication. CVSS score: 8.8/10. Published 2026-02-12.
- How severe is CVE-2026-25922?
- High severity. CVSS v3 base score is 8.8 out of 10.