Browserstack Browserstack-runner vulnerabilities
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Published CVEs affecting Browserstack Browserstack-runner: 2 record(s), with affected versions and fixes.
CVE-2026-49144
Medium · 6.5
CWE-22 Jun 2, 2026
BrowserStack Runner 0.9.5 Path Traversal via _default HTTP Handler
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.
CVE-2026-49143
High · 8.8
CWE-94 Jun 2, 2026
BrowserStack Runner 0.9.5 Unauthenticated RCE via /_log HTTP Handler
BrowserStack Runner through 0.9.5 contains a remote code execution vulnerability in the /_log HTTP handler that allows unauthenticated network-adjacent attackers to execute arbitrary code by submitting crafted JSON request bodies to the handler, which passes user-supplied data to vm.runInNewContext() combined with eval(). Attackers can escape the Node.js vm sandbox by leveraging a host-context Function reference through util.format to access the host process via this.constructor.constructor, achieving full remote code execution on the underlying system without any authentication.