CVE-2026-42849

9.3 criticalEPSS 0.3%

Critical (9.3) in goauthentik authentik. EPSS 0.3% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

9.3 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 25% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2026-06-02
Modified: 2026-07-22
Record from: the NVD, synced 2026-10-19

Affected

goauthentik:authentik

References

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

Check your stack JSON