CVE-2026-49144 BrowserStack Runner 0.9.5 Path Traversal via _default HTTP Handler
Unauthenticated attackers can read arbitrary files via path traversal in the BrowserStack Runner HTTP server, exposing sensitive data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-49144?
CVE-2026-49144 is a high-severity path traversal vulnerability in browserstack-runner, published on 2 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-22
Which versions are affected by CVE-2026-49144?
2 open source packages ship an affected version, including browserstack-runner.
| Package | Affected | Fixed in |
|---|---|---|
browserstack-runner npm | All versions to 0.9.5 | None |
browserstack-runner npm | All versions to 0.9.5 | None |
How do I fix CVE-2026-49144?
No fix has been published for CVE-2026-49144 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-49144 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-49144 exists.
Sources
Also known as GHSA-8rpw-6cqh-2v9h.