CVE-2026-111642

FastapiAdmin through 3.0 contains a hard-coded JWT signing secret in backend/app/config/setting.py that allows low-privileged users to forge tokens impersonating the superuser. Attackers can register via the unauthenticated /api/v1/system/user/register endpoint, log in, and forge an HS256 token keeping their session_id but naming the superuser in user_name to gain superuser privileges.

CVSS 4.0

8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 29% of CVEs (scores of 2026-10-26)

CWE

CWE-321

Published

2026-10-16

Modified

2026-10-16

Record from

the NVD, synced 2026-10-19

References

• https://github.com/fastapiadmin/FastapiAdmin/blob/v3.0/backend/app/config/setting.py#L67
• https://github.com/fastapiadmin/FastapiAdmin/blob/v3.0/backend/app/core/dependencies.py#L72-L112
• https://hackmd.io/@hieuPenguinnn/fastapiadmin-unauthenticated-autologin-and-hardcoded-jwt-secret
• https://www.vulncheck.com/advisories/fastapiadmin-through-3.0-hard-coded-jwt-secret-privilege-escalation
• https://hackmd.io/@hieuPenguinnn/fastapiadmin-unauthenticated-autologin-and-hardcoded-jwt-secret

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