CVE-2026-53977

HIGH 7.5

OpenChamber 1.11.7 Unauthenticated DoS via /api/system/shutdown

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

OpenChamber 1.11.7 contains an authentication bypass vulnerability that allows unauthenticated remote attackers to terminate the server process by sending a POST request to the /api/system/shutdown endpoint, which is registered before the authentication middleware in the Express route handler chain. Attackers can exploit the route registration order in bootstrap-runtime.js to reach the shutdown handler before auth middleware executes, causing denial of service to all active AI coding sessions and locking out legitimate remote users regardless of whether UI_PASSWORD is configured.

CWE	CWE-306
Vendor	bohdan triapitsyn
Product	openchamber
Published	Aug 6, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

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-dos-via-api-system-shutdown

Credits

🔍 Katriel Moses