CVE-2026-42849 — authentik: Reflected XSS in SFE AutosubmitStage allows IDP account takeover

CVE-2026-42849

authentik: Reflected XSS in SFE AutosubmitStage allows IDP account takeover PUBLISHED

Description (CNA)

authentik is an open-source identity provider. Prior to versions 2025.12.5 and 2026.2.3, due to the implementation of stages in the SFE (Simple Flow Executor) in order to make the interface more compatible with legacy browsers, it was possible to use an XSS exploit in the AutosubmitStage. This issue has been patched in versions 2025.12.5 and 2026.2.3.

Affected (CNA)

Vendor / product	Versions
goauthentik / authentik	affected < 2025.12.5; affected < 2026.2.3

CWE

CWE-79

References

https://github.com/goauthentik/authentik/security/advisories/GHSA-pgff-5mx8-fqj3

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.