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CVE-2026-49144

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.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Browserstack
Products
Browserstack-local Browserstack-runner
CVE-2026-49143

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.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Browserstack
Products
Browserstack-local Browserstack-runner
CVE-2025-57283

browserstack-local: OS command injection in the logfile variable in lib/Local.js

The Node.js package browserstack-local 1.5.8 contains a command injection vulnerability. This occurs because the logfile variable is not properly sanitized in lib/Local.js.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Browserstack
Products
Browserstack-local