High 8.8Published Jul 9, 2026

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

Updated under an hour ago (Oct 26, 2026, 10:30 PM ET)

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Every CVE for mockoon

Exploited in the last 30 days

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: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-306, CWE-352, CWE-732, CWE-942
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Jul 9, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

mockoon mockoon mockoon:mockoon (from the name)	before 9.7.0	CNA record

References

References

https://github.com/mockoon/mockoon/security/advisories/GHSA-rqx4-3f6q-3x2v	x-refsource-confirm
https://github.com/mockoon/mockoon/pull/2254	x-refsource-misc
https://github.com/mockoon/mockoon/commit/c420b5a56918475b8663977b51e5f986e45b3299	x-refsource-misc
https://github.com/mockoon/mockoon/releases/tag/v9.7.0	x-refsource-misc
https://mockoon.com/releases/9.7.0	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.