PT-2026-56907 · Mockoon · Mockoon

Published 2026-07-09 · Updated 2026-07-09 · CVE-2026-59149

NVD

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

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.

Exploit

Fix

Path traversal

Relative Path Traversal

Weakness Enumeration

CWE-22

CWE-23

Related Identifiers

CVE-2026-59149

Affected Products

Mockoon

References · 6

• 🔥 https://github.com/mockoon/mockoon/security/advisories/GHSA-8wqc-v2q8-vff2 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-59149 · Security Note
• https://github.com/mockoon/mockoon/pull/2255 · Note
• https://mockoon.com/releases/9.7.0 · Note
• https://github.com/mockoon/mockoon/commit/b42bdfb7f82e83f0e81bea8e6fe41adf5ec82585 · Note
• https://github.com/mockoon/mockoon/releases/tag/v9.7.0 · Note