CVE-2026-53975

CRITICAL 9.8

OpenChamber 1.11.7 Unauthenticated RCE via /api/fs/exec

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-78
Vendor	bohdan triapitsyn
Product	openchamber
Published	Aug 6, 2026
Last Updated	Aug 6, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Bohdan Triapitsyn / OpenChamber

0 ≤ 1.11.7

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/openchamber/openchamber github.com: https://github.com/openchamber/openchamber/commit/f1b9506132faf6c564a2694c7f33b94421a49b4a vulncheck.com: https://www.vulncheck.com/advisories/openchamber-unauthenticated-rce-via-api-fs-exec

Credits

🔍 Katriel Moses