CVE-2026-49144

MEDIUM 6.5

BrowserStack Runner 0.9.5 Path Traversal via _default HTTP Handler

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

7th

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.

CWE	CWE-22
Vendor	browserstack
Product	browserstack-runner
Published	Jun 2, 2026
Last Updated	Jun 3, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

browserstack / browserstack-runner

0 ≤ 0.9.5

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/browserstack/browserstack-runner/security/advisories/GHSA-8rpw-6cqh-2v9h vulncheck.com: https://www.vulncheck.com/advisories/browserstack-runner-path-traversal-via-default-http-handler

Credits

Christ Bouchuen