---
id: CVE-2026-90942
title: >-
  Casdoor through 4.4.0 fails to properly mask the instance-wide built-in
  certificate private key in /api/get-certs and /api/get-cert endpoints,
  allowing organization administrators to retrieve it
summary: >-
  Casdoor through 4.4.0 fails to properly mask the instance-wide built-in
  certificate private key in /api/get-certs and /api/get-cert endpoints,
  allowing organization administrators to retrieve it. Attackers can use the
  exposed private key…
severity: critical
cvss: 9.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N'
cwe:
  - CWE-863
vendor: casdoor
product: casdoor
affected:
  - casdoor <= 4.4.0
published: '2026-09-14'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T17:17:44.670'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90942'
references:
  - url: 'https://github.com/casdoor/casdoor'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/casdoor/casdoor/blob/v4.4.0/controllers/cert.go'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/casdoor/casdoor/blob/v4.4.0/object/cert.go'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/geo-chen/oss/blob/main/casdoor.md#finding-3-organization-admin-can-read-the-global-built-in-jwt-signing-private-key-via-apiget-certs-and-apiget-cert-incomplete-fix-of-3003--enables-cross-organization-token-forgery
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/casdoor-through-4.4.0-private-key-exposure-via-certificate-endpoints
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00277
epssPercentile: 0.1809
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-09-14T19:07:44.583769Z'
ingestedAt: '2026-09-14T19:13:23.462Z'
---

## Overview

Casdoor through 4.4.0 fails to properly mask the instance-wide built-in certificate private key in /api/get-certs and /api/get-cert endpoints, allowing organization administrators to retrieve it. Attackers can use the exposed private key to forge JWT tokens for any user in any organization, including global administrators.

## Remediation

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