Arbitrary Code Injection Affecting browserstack-runner package, versions >=0.0.0
Threat Intelligence
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The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published1 Jul 2026
- disclosed3 Jun 2026
- creditUnknown
Introduced: 3 Jun 2026
CVE-2026-49143 (opens in a new tab)How to fix?
There is no fixed version for browserstack-runner.
Overview
browserstack-runner is an A command line interface to run browser tests over BrowserStack
Affected versions of this package are vulnerable to Arbitrary Code Injection via the _log HTTP handler. An attacker can execute arbitrary code on the host system by sending specially crafted POST requests containing malicious payloads, which are processed without authentication. This is only exploitable if the HTTP server is accessible on the network and the process is running, typically during a test run.