---
id: CVE-2026-49144
title: >-
  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
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
  unauthentic…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-22
vendor: browserstack
product: browserstack-runner
affected:
  - browserstack-runner <= 0.9.5
published: '2026-06-02'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T16:17:18.863'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-49144'
references:
  - url: >-
      https://github.com/browserstack/browserstack-runner/security/advisories/GHSA-8rpw-6cqh-2v9h
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/browserstack-runner-path-traversal-via-default-http-handler
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/browserstack/browserstack-runner/security/advisories/GHSA-8rpw-6cqh-2v9h
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-06-03T14:24:56.644186Z'
epss: 0.00304
epssPercentile: 0.21267
ingestedAt: '2026-10-08T16:52:14.685Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.