Path Traversal Vulnerability in BrowserStack Runner by BrowserStack
CVE-2026-49144

7.1HIGH

Key Information:

Vendor

Browserstack

Status
Browserstack-runner
Vendor
CVE Published:
2 June 2026

What is CVE-2026-49144?

BrowserStack Runner versions up to 0.9.5 are vulnerable to a path traversal attack due to an issue in the default HTTP handler located in lib/server.js. This vulnerability allows unauthenticated attackers adjacent to the network to exploit the unauthenticated HTTP server, which is bound to all interfaces. By doing so, attackers can traverse outside the project's root directory, potentially gaining access to sensitive files that should not be exposed, thereby posing a significant security risk.

Affected Version(s)

browserstack-runner 0 <= 0.9.5

References

https://github.com/browserstack/browserstack-runner/secur...
vendor-advisory
https://www.vulncheck.com/advisories/browserstack-runner-...
third-party-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Christ Bouchuen
.