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CVE-2026-59148GHSA-RQX4-3F6Q-3X2V

Mockoon: Unauthenticated admin API + wildcard CORS allows mock-state hijack and secret theft

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 9.7.0
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: poc
  • Automatable: no
  • Technical impact: total

Summary

Mockoon provides way to design and run mock APIs. Prior to 9.7.0, Mockoon's admin API in commons-server/src/libs/server/admin-api.ts is mounted on the same Express listener as user-defined mock routes, enabled by default in shipped runtimes, serves Access-Control-Allow-Origin: * with write methods allowed, and has no authentication. Any unauthenticated caller who can reach the mock server port can read MOCKOON_* environment variables, write arbitrary process environment variables through /mockoon-admin/env-vars, rewrite mock route bodies, statuses, and headers through PUT /mockoon-admin/environment, read transaction logs and SSE streams, and purge state. This issue is fixed in version 9.7.0.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: poc · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • mockoon mockoon

    fixed in 9.7.0

  • @mockoon/commons-servernpm

    fixed in 9.7.0

  • @mockoon/clinpm

    fixed in 9.7.0

References 5

GitHub · mockoon/mockoon

mockoon.com