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CVE-2026-59149

Mockoon: Path traversal in templated `filePath` lets a request escape the served directory (prefix-only base check)

CVSS 6.5 MEDIUMEPSS 0.3%CWE-22CWE-23
Vexday Risk Score
13Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 6.5EPSS 0.3%KEV nãoPoC Nuclei Metasploit Patch
Lifecycle
09 Jul 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Affected products
mockoon · mockoon