CVE-2026-49144: Browserstack Browserstack-Runner

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

BrowserStack Runner through 0.9.5 contains a path traversal vulnerability in the _default HTTP handler in lib/server.js that allows unauthenticated network-adjacent attackers to read arbitrary files. Attackers can exploit the unauthenticated HTTP server bound on all interfaces to traverse outside the project root and access sensitive files.

Affected products

• Browserstack Browserstack-Runner: up to and including 0.9.5

Published 2026-06-02. Last modified 2026-10-08.