Vulnerability Description
Mockoon provides way to design and run mock APIs. Prior to 9.7.0, a FILE response whose filePath embeds request data is confined by getSafeFilePath in packages/commons-server/src/libs/server/server.ts with resolvedPath.startsWith(staticBaseDir). That prefix test has no path-separator boundary, so a ../-escaped path whose absolute form string-prefixes the base directory passes, allowing an unauthenticated client to read files from sibling paths outside the served directory through HTTP sendFile, WebSocket, or callbacks. This issue is fixed in version 9.7.0.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/mockoon/mockoon/commit/b42bdfb7f82e83f0e81bea8e6fe41adf5ec825
- https://github.com/mockoon/mockoon/pull/2255
- https://github.com/mockoon/mockoon/releases/tag/v9.7.0
- https://github.com/mockoon/mockoon/security/advisories/GHSA-8wqc-v2q8-vff2
- https://mockoon.com/releases/9.7.0
- https://github.com/mockoon/mockoon/security/advisories/GHSA-8wqc-v2q8-vff2
FAQ
What is CVE-2026-59149?
CVE-2026-59149 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Mockoon provides way to design and run mock APIs. Prior to 9.7.0, a FILE response whose filePath embeds request data is confined by getSafeFilePath in packages/commons-server/src/libs/server/server.ts...
How severe is CVE-2026-59149?
CVE-2026-59149 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-59149?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.