CVE-2026-59148
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.26%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.26% probability · 18th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-306, CWE-352, CWE-732, CWE-942
- Source
- security-advisories@github.com
References
- https://github.com/mockoon/mockoon/commit/c420b5a56918475b8663977b51e5f986e45b3299
- https://github.com/mockoon/mockoon/pull/2254
- https://github.com/mockoon/mockoon/releases/tag/v9.7.0
- https://github.com/mockoon/mockoon/security/advisories/GHSA-rqx4-3f6q-3x2v
- https://mockoon.com/releases/9.7.0
- https://github.com/mockoon/mockoon/security/advisories/GHSA-rqx4-3f6q-3x2v
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.