CVE-2026-53977
Received Received - Intake

Authentication Bypass in OpenChamber Leading to DoS

Publication date: 2026-08-06

Last updated on: 2026-08-06

Assigner: VulnCheck

Description
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.

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Meta Information

Published
2026-08-06
Last Modified
2026-08-06
Generated
2026-08-06
AI Q&A
2026-08-06
EPSS Evaluated
N/A
NVD
CVE-2026-53977
EUVD
EUVD-2026-54078

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
openchamber openchamber to 1.11.7 (inc)
openchamber openchamber 1.11.7

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-306 The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

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Executive Summary

OpenChamber 1.11.7 has an authentication bypass flaw where the /api/system/shutdown endpoint is registered before authentication middleware. This allows unauthenticated remote attackers to send a POST request and terminate the server process, causing a denial of service for all active AI coding sessions and locking out legitimate users.

Detection Guidance

Check if OpenChamber 1.11.7 is running by inspecting active processes or listening ports. Use curl to test the vulnerable endpoint: curl -X POST http://<target-ip>:<port>/api/system/shutdown. If the server terminates unexpectedly, the system is likely vulnerable.

Impact Analysis

This vulnerability allows attackers to crash the OpenChamber server remotely without any credentials, disrupting all active AI coding sessions and preventing legitimate users from accessing the system. It affects availability and can cause downtime for all remote users.

Mitigation Strategies

Upgrade OpenChamber to a version beyond 1.11.7, specifically commit f1b9506 or later. If upgrading is not possible, restrict network access to the /api/system/shutdown endpoint via firewall rules or disable remote access entirely.

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