BrowserStack Runner 0.9.5 Path Traversal via _default HTTP Handler
Priority MEDIUM 64CWE-22Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-22 and the CVSS impact.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00418 36th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| browserstack | browserstack-runner | up to 0.9.5 | — | No fix listed | CNA |
| — | browserstack-runner (npm) | up to 0.9.5 | — | No fix listed | GHSA-8rpw-6cqh-2v9h |
- browserstack-runner Vendorbrowserstack Affected up to 0.9.5 Fixed in — No fix listed CNA
- browserstack-runner (npm) Vendor— Affected up to 0.9.5 Fixed in — No fix listed GHSA-8rpw-6cqh-2v9h
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-49144
- 2026-10-03 Alias added: GHSA-8rpw-6cqh-2v9h
References
More browserstack vulnerabilities
- TI-2026-36356 BrowserStack Runner 0.9.5 Unauthenticated RCE via /_log HTTP Handler CVSS 4.0HIGH 8.7
- TI-2026-36003 OS command injection in browserstack-cypress-cli CVSS 3.1HIGH 7.8
- TI-2025-35496 The Node.js package browserstack-local 1.5.8 contains a command injection vulnerability. CVSS 3.1HIGH 7.8
Sources
- CVE-2026-49144 · CVE Program
- CVE-2026-49144 · NVD
- FIRST EPSS
- GHSA-8rpw-6cqh-2v9h · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences