CVSS 3.1
8.5 highCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:HCVE-2026-47201
High (8.5) in goauthentik authentik. EPSS 0.2% chance of exploitation in the next 30 days. Fixed in goauthentik.io 0.0.0-20260528144335-a370d76d23c7.
authentik is an open-source identity provider. Prior to versions 2025.12.5, 2026.2.3, and 2026.5.1, authentik's SAML Source ACS endpoint is vulnerable to XML Signature Wrapping when validating upstream SAML responses. An attacker with any account at the upstream IdP can reuse a valid signed assertion to authenticate as another federated user. This issue has been patched in versions 2025.12.5, 2026.2.3, and 2026.5.1.
Severity
- EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 7% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-347, CWE-20
- Published
- Modified
- Record from
- the NVD, synced
Affected
- goauthentik:authentik
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-c3m2-jqmq-pvp3 | Go | goauthentik.io | <0.0.0-20260528144335-a370d76d23c7 | 0.0.0-20260528144335-a370d76d23c7 |