Vulnerability · Published Oct 16, 2026 · Assigned by VulnCheck

CVE-2026-111641FastapiAdmin through 3.0 Authentication Bypass via Auto-Login Endpoints

Critical 9.8

In plain English

A critical-severity missing authentication in FastapiAdmin from fastapiadmin. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.4%top 62.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
fastapiadmin	FastapiAdmin	0 – through 3.0

Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

https://hackmd.io/@hieuPenguinnn/fastapiadmin-unauthenticated-autologin-and-hardcoded-jwt-secret third-party-advisory
https://github.com/fastapiadmin/FastapiAdmin/blob/v3.0/backend/app/api/v1/module_system/auth/controller.py#L173-L251 technical-description
VulnCheck Advisory: FastapiAdmin through 3.0 Authentication Bypass via Auto-Login Endpoints third-party-advisory