Vulnerability · Published Jun 2, 2026 · Assigned by VulnCheck
CVE-2026-49144BrowserStack Runner 0.9.5 Path Traversal via _default HTTP Handler
Medium 6.5
In plain English
A medium-severity path traversal in browserstack-runner from browserstack. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.4%top 63.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | browserstack-runner | no fix listed | GHSA-8rpw-6cqh-2v9h |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| browserstack | browserstack-runner | 0 – through 0.9.5 |
Weakness: CWE-22 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N