RCE in Bohdan Triapitsyn Openchamber
CVE-2026-53975
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.
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.011 (63.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Bohdan Triapitsyn Openchamber — versions 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (product)
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-53975?
- CVE-2026-53975 is a critical-severity vulnerability in Bohdan Triapitsyn Openchamber, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-08-06.
- How severe is CVE-2026-53975?
- Critical severity. CVSS v3 base score is 9.8 out of 10.