CVE-2026-49144 HIGH

CVE-2026-49144: BrowserStack Runner 0.9.5 Path Traversal via _default HTTP Handler

Vendor Browserstack
Product browserstack-runner
Weakness CWE-22 · Path traversal
Published June 2, 2026
Last update June 3, 2026

CVSS base score

7.1/10
Attack vector Adjacent
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 2, 2026 CVE published
June 3, 2026 Record updated