What’s Vulnerable › Vulnerabilities

CVE-2026-59149: Mockoon: Path traversal in templated `filePath` lets a request escape the served directory (prefix-only base check)

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-09 · updated 2026-07-10
• Weakness: CWE-22

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.

Affected products

• mockoon: before 9.7.0

References

• https://github.com/mockoon/mockoon/commit/b42bdfb7f82e83f0e81bea8e6fe41adf5ec82585
• 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

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