CVE-2026-59149: Mockoon

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Mockoon Mockoon: before 9.7.0 (fixed in 9.7.0)

Published 2026-07-09. Last modified 2026-07-10.