Vulnerability details

CVE-2026-111641

fastapiadmin FastapiAdmin

FastapiAdmin through 3.0 Authentication Bypass via Auto-Login Endpoints

CVSS 4.0

9.3Critical

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.

CVSS scores

Score	Version	Source	Vector
9.3Critical	4.0	CVEProject cvelistV5 (CNA) (VulnCheck)	`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`
9.8Critical	3.1	CVEProject cvelistV5 (CNA) (VulnCheck)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
fastapiadmin	FastapiAdmin	v ≤ 3.0	CVEProject cvelistV5 (CNA)

References and advisories

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
https://www.vulncheck.com/advisories/fastapiadmin-through-3.0-authentication-bypass-via-auto-login-endpoints third-party-advisory

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Details

Published: 2026-10-16
Last updated: 2026-10-17
State: Published
Assigner (CNA): VulnCheck
Kolun priority: 23 · Low

Exploit prediction (EPSS)

0.43%

Probability of exploitation in 30 days

37.8%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

CWE-306
Missing Authentication for Critical Function