CVE-2026-111641
FastapiAdmin through 3.0 Authentication Bypass via Auto-Login Endpoints
- State
- Published
- Severity
- 9.3 Critical
- Published
- Oct 16, 2026
- Updated
- Oct 16, 2026
- Reserved
- Oct 16, 2026
Description
FastapiAdmin through 3.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to obtain sessions for any user by abusing unprotected auto-login endpoints. Attackers can list users via /api/v1/auth/auto-login/users, mint a superuser auto-login token, and exchange it for a JWT session to gain full administrative control.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-306 Missing Authentication for Critical Function
Affected Products
| Product | Versions |
|---|---|
FastapiAdminfastapiadmin |
|
References
- https://hackmd.io/@hieuPenguinnn/fastapiadmin-unauthenticated-autologin-and-hardcoded-jwt-secretthird-party-advisory
- https://github.com/fastapiadmin/FastapiAdmin/blob/v3.0/backend/app/api/v1/module_system/auth/controller.py#L173-L251technical-description
- VulnCheck Advisory: FastapiAdmin through 3.0 Authentication Bypass via Auto-Login Endpointsthird-party-advisory
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