---
id: CVE-2026-53975
title: >-
  OpenChamber 1.11.7 contains an unauthenticated remote code execution
  vulnerability that allows remote attackers to execute arbitrary shell commands
  by sending crafted POST requests to the /api/fs/exec endpoint, which passes
  commands verb…
summary: >-
  OpenChamber 1.11.7 contains an unauthenticated remote code execution
  vulnerability that allows remote attackers to execute arbitrary shell commands
  by sending crafted POST requests to the /api/fs/exec endpoint, which passes
  commands verb…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-78
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-2026-53975'
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-unauthenticated-rce-via-api-fs-exec
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.01676
epssPercentile: 0.75889
ingestedAt: '2026-09-16T21:05:36.834Z'
---

## Overview

OpenChamber 1.11.7 contains an unauthenticated remote code execution vulnerability that allows remote attackers to execute arbitrary shell commands by sending crafted POST requests to the /api/fs/exec endpoint, which passes commands verbatim to Node.js spawn() without any allowlist, blocklist, or argument validation. The authentication middleware becomes a no-op when UI_PASSWORD is not configured, matching the default Docker deployment, enabling attackers to execute arbitrary OS commands as the application user and retrieve full command output including stdout, stderr, and exit code from the server response.

## Remediation

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