CVE-2026-49448
Authentication Bypass in Authentik via Empty POST
Publication date: 2026-06-02
Last updated on: 2026-06-02
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| goauthentik | authentik | to 2026.5.1 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-287 | When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability affects authentik, an open-source identity provider. Prior to versions 2025.12.6, 2026.2.4, and 2026.5.1, it was possible to bypass the Source stage by sending an empty POST request. This means that an attacker could circumvent a security step in the authentication process.
How can this vulnerability impact me? :
The vulnerability has a high severity with a CVSS score of 9.8, indicating it can have a critical impact. Since the Source stage can be bypassed without authentication or user interaction, an attacker could gain unauthorized access, leading to full compromise of confidentiality, integrity, and availability of the system.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, you should upgrade authentik to one of the patched versions: 2025.12.6, 2026.2.4, or 2026.5.1.