---
id: CVE-2026-53976
title: >-
  OpenChamber 1.11.7 contains a path traversal vulnerability in the file-serving
  endpoints /api/fs/read, /api/fs/stat, and /api/fs/raw that allows
  unauthenticated remote attackers to read arbitrary files by supplying the
  allowOutsideWorksp…
summary: >-
  OpenChamber 1.11.7 contains a path traversal vulnerability in the file-serving
  endpoints /api/fs/read, /api/fs/stat, and /api/fs/raw that allows
  unauthenticated remote attackers to read arbitrary files by supplying the
  allowOutsideWorksp…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-22
published: '2026-08-06'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T20:18:30.540'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-53976'
references:
  - url: 'https://github.com/openchamber/openchamber'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/openchamber/openchamber/commit/f1b9506132faf6c564a2694c7f33b94421a49b4a
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/openchamber-path-traversal-file-read-via-allowoutsideworkspace-parameter
    label: disclosure@vulncheck.com
tags:
  - nvd
  - exploit-available
epss: 0.02612
epssPercentile: 0.84756
exploits:
  nuclei:
    - CVE-2026-53976
  checkedAt: '2026-09-25T08:21:02.369Z'
exploitAvailable: true
ingestedAt: '2026-09-16T21:05:36.834Z'
---

## Overview

OpenChamber 1.11.7 contains a path traversal vulnerability in the file-serving endpoints /api/fs/read, /api/fs/stat, and /api/fs/raw that allows unauthenticated remote attackers to read arbitrary files by supplying the allowOutsideWorkspace=true query parameter alongside an absolute path, bypassing the workspace boundary check in resolveReadPathFromContext. Attackers can exploit the vacuous isPathWithinRoot guard to read sensitive files such as the JWT signing secret, SSH private keys, API credentials, and environment variables, enabling full authentication bypass by forging session cookies on password-protected deployments.

## Remediation

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