---
id: CVE-2026-92811
title: >-
  browserless versions 1.44.0 through 2.56.7 fail to enforce file protocol
  restrictions in Playwright websocket endpoints, allowing authenticated token
  holders to read arbitrary files
summary: >-
  browserless versions 1.44.0 through 2.56.7 fail to enforce file protocol
  restrictions in Playwright websocket endpoints, allowing authenticated token
  holders to read arbitrary files. Attackers can navigate Playwright-driven
  browsers to f…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-200
vendor: browserless
product: browserless
affected:
  - browserless >= 1.44.0 <= 2.56.7
published: '2026-09-16'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T20:53:07.383'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92811'
references:
  - url: 'https://github.com/browserless/browserless'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/browserless/browserless/blob/v2.50.1/src/browsers/browsers.cdp.ts#L105-L135
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/browserless/browserless/blob/v2.50.1/src/browsers/browsers.playwright.ts
    label: disclosure@vulncheck.com
  - url: 'https://github.com/geo-chen/oss/blob/main/browserless.md'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/browserless-1.44.0-through-2.56.7-file-protocol-restriction-bypass
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.0026
epssPercentile: 0.1801
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-21T15:40:03.577982Z'
ingestedAt: '2026-09-16T21:05:36.882Z'
---

## Overview

browserless versions 1.44.0 through 2.56.7 fail to enforce file protocol restrictions in Playwright websocket endpoints, allowing authenticated token holders to read arbitrary files. Attackers can navigate Playwright-driven browsers to file scheme URLs and access files accessible to the container process despite the ALLOW_FILE_PROTOCOL setting defaulting to false.

## Remediation

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