CVE-2026-59148 – Mockoon: Unauthenticated admin API + wildcard CORS allows mock-state hijack and secret theft

CVE ID :CVE-2026-59148

Published : July 9, 2026, 7:17 p.m. | 31 minutes ago

Description :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.

Severity: 8.8 | HIGH

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