---
id: CVE-2026-111642
title: >-
  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
summary: >-
  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/syste…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-321
vendor: fastapiadmin
product: FastapiAdmin
affected:
  - FastapiAdmin <= 3.0
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T20:17:21.400'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-111642'
references:
  - url: >-
      https://github.com/fastapiadmin/FastapiAdmin/blob/v3.0/backend/app/config/setting.py#L67
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/fastapiadmin/FastapiAdmin/blob/v3.0/backend/app/core/dependencies.py#L72-L112
    label: disclosure@vulncheck.com
  - url: >-
      https://hackmd.io/@hieuPenguinnn/fastapiadmin-unauthenticated-autologin-and-hardcoded-jwt-secret
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/fastapiadmin-through-3.0-hard-coded-jwt-secret-privilege-escalation
    label: disclosure@vulncheck.com
  - url: >-
      https://hackmd.io/@hieuPenguinnn/fastapiadmin-unauthenticated-autologin-and-hardcoded-jwt-secret
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.0036
epssPercentile: 0.29574
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T19:20:27.537959Z'
ingestedAt: '2026-10-16T18:43:08.681Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.