CVE-2026-47201
Last modified
CVE-2026-47201 is a high-severity vulnerability rated 8.5/10 on the CVSS scale. 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. EPSS estimates a 0.18% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Goauthentik | Authentik | < 2025.12.6 |
| Goauthentik | Authentik | >= 2026.2.0, < 2026.2.4 |
| Goauthentik | Authentik | >= 2026.5.0, < 2026.5.1 |
References
- https://github.com/goauthentik/authentik/security/advisories/GHSA-c3m2-jqmq-pvp3Mitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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