CVE-2026-111642CWE-321

CVE-2026-111642

High · published October 16, 2026

CVSS v3.1

8.8

EPSS

Percentile

28.6

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS v3.1: 8.8 · HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0: 8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS: 0.00360 · 28.6th percentile
Weakness: CWE-321 · Use of Hard-coded Cryptographic Key
Published: 2026-10-16T22:17Z

References (5)

https://github.com/fastapiadmin/FastapiAdmin/blob/v3.0/backend/app/config/setting.py#L67 · [email protected]https://github.com/fastapiadmin/FastapiAdmin/blob/v3.0/backend/app/core/dependencies.py#L72-L112 · [email protected]https://hackmd.io/@hieuPenguinnn/fastapiadmin-unauthenticated-autologin-and-hardcoded-jwt-secret · [email protected]https://www.vulncheck.com/advisories/fastapiadmin-through-3.0-hard-coded-jwt-secret-privilege-escalation · [email protected]https://hackmd.io/@hieuPenguinnn/fastapiadmin-unauthenticated-autologin-and-hardcoded-jwt-secret · 134c704f-9b21-4f2e-91b3-4a467353bcc0

EPSS history

Timeline

18 OCT 03:27Z
EPSS moved — → 0%
epss
16 OCT 17:39Z
FastapiAdmin through 3.0 Hard-Coded JWT Secret Privilege Escalation
cvelistv5
16 OCT 17:39Z
FastapiAdmin through 3.0 Hard-Coded JWT Secret Privilege Escalation
cvelistv5