CVE-2026-49443 authentik: `UserSourceConnection.user` and `GroupSourceConnection.group` are changeable through the API

What is CVE-2026-49443?

CVE-2026-49443 is a high-severity authentication bypass vulnerability in goauthentik authentik, published on 2 Jun 2026. Any signed-in user can exploit it over the network, 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, an attacker with the ability to change a source connection, and an account in one of the configured sources can log into any account. 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-2026-49443?

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

Products include Goauthentik Authentik.

How do I fix CVE-2026-49443?

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-2026-49443 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-49443 exists.

Other vulnerabilities in goauthentik authentik

• CVE-2026-49448 authentik: SourceStage bypass via empty POST Critical 9.8
• 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

Sources

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

Also known as BIT-authentik-2026-49443, GHSA-wr38-7xg8-fqxr.