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High severity8.5GHSA Advisory· Published Jun 2, 2026· Updated Jun 4, 2026

CVE-2026-47201

CVE-2026-47201

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
goauthentik.ioGo
< 0.0.0-20260528144335-a370d76d23c70.0.0-20260528144335-a370d76d23c7

Affected products

4
  • authentik/authentikGHSA2 versions
    < 0.0.0-20260528144335-a370d76d23c7+ 1 more
    • (no CPE)range: < 0.0.0-20260528144335-a370d76d23c7
    • cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:*range: <2025.12.6
  • osv-coords2 versions
    pkg:bitnami/authentikpkg:golang/goauthentik.io
    < 2026.5.1+ 1 more
    • (no CPE)range: < 2026.5.1
    • (no CPE)range: < 0.0.0-20260528144335-a370d76d23c7

Patches

Vulnerability mechanics

References

4

News mentions

1