CVE-2026-42849

published 2026-06-02

CVE-2026-42849: 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)…

Priority P3 49 critical 9.3 CVSS 3.1

AV N AC L PR N UI R S C C H I H A N

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

3 ranges

Vendor	Product	Version range	Fixed in
goauthentik	authentik	< 2026.2.3	2026.2.3
goauthentik	authentik	< 2025.12.5	2025.12.5
goauthentik	authentik	>= 2026.2.0 < 2026.2.3	2026.2.3

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CWE-79