CVE-2026-49448 authentik: SourceStage bypass via empty POST

What is CVE-2026-49448?

CVE-2026-49448 is a critical authentication bypass vulnerability in goauthentik authentik, published on 2 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

authentik is an open-source identity provider. Prior to versions 2025.12.6, 2026.2.4, and 2026.5.1, the Source stage can be bypassed by sending an empty POST. This issue has been patched in versions 2025.12.6, 2026.2.4, and 2026.5.1.

Weakness: CWE-287

Which versions are affected by CVE-2026-49448?

1 open source package ship an affected version, including authentik. It affects 1 product.

Products include Goauthentik Authentik.

How do I fix CVE-2026-49448?

Upgrade authentik to a fixed version for your release line: 2025.12.6, 2026.2.4 or 2026.5.1.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-49448 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-49448 exists.

Other vulnerabilities in goauthentik authentik

• CVE-2023-46249 authentik potential installation takeover when default admin user is deleted Critical 9.7
• CVE-2022-23555 authentik vulnerable to Improper Authentication via invitation URL token reuse Critical 9.4
• CVE-2026-42849 authentik: Reflected XSS in SFE AutosubmitStage allows IDP account takeover Critical 9.3
• CVE-2026-25227 authentik affected by Remote Code Execution via Context Key Injection in PropertyMapping Test Endpoint Critical 9.1
• CVE-2024-47070 authentik vulnerable to password authentication bypass via X-Forwarded-For HTTP header Critical 9.1

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-authentik-2026-49448, GHSA-xp7f-xjjx-gwm8.