CVE-2026-47201
EUVD-2026-3402702.06.2026, 21:16
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.Enginsight
Affected Products (NVD)
| Vendor | Product | Version |
|---|---|---|
| goauthentik | authentik | 𝑥 < 2025.12.6 |
| goauthentik | authentik | 2026.2.0 ≤ 𝑥 < 2026.2.4 |
| goauthentik | authentik | 2026.5.0 ≤ 𝑥 < 2026.5.1 |
𝑥
= Vulnerable software versions
Common Weakness Enumeration
- CWE-20 - Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
- CWE-347 - Improper Verification of Cryptographic SignatureThe software does not verify, or incorrectly verifies, the cryptographic signature for data.