{"id":"CVE-2026-53977","title":"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 th…","summary":"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 th…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-306"],"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-2026-53977","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-dos-via-api-system-shutdown","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"epss":0.00967,"epssPercentile":0.60163,"ingestedAt":"2026-09-16T21:05:36.835Z","slug":"CVE-2026-53977","body":"## Overview\n\nOpenChamber 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}