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Vulnerability record · CVE-2026-49144 · published 2 June 2026

CVE-2026-49144: Path traversal vulnerability

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.

7.1 CVSS 4.0 High EPSS 0.30% · top 79.2% CWE-22 · Path traversal Deferred
7.1CVSS 4.0 base score
0.30%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
22 Jul 2026Last modified by NVD

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.

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-49144), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.