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OpenChamber 1.11.7 Unauthenticated DoS via /api/system/shutdown

Type: advisorySources: OSV

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.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-53977
Confirmed fixed CVEs
Not specified
Updated in this feed
4 Nov 2026, 02:32 UTC · Revision 1

Source evidence

OpenChamber 1.11.7 Unauthenticated DoS via /api/system/shutdown

core-osv · Original source

Published 6 Aug 2026, 14:43 UTC

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.

osv:CVE-2026-53977
Complete source record
{
  "id": "f95f5904d666b1873e491c49d9207f52e2b2bc97325c574aeb29c82be7e74efa",
  "url": "https://osv.dev/vulnerability/CVE-2026-53977",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "OpenChamber 1.11.7 Unauthenticated DoS via /api/system/shutdown",
    "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 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.",
    "evidence": "osv:CVE-2026-53977",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-53977",
      "aliases": [
        "CVE-2026-53977"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openchamber/openchamber",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "f1b9506132faf6c564a2694c7f33b94421a49b4a"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.11.7"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "f1b9506132faf6c564a2694c7f33b94421a49b4a"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.12.4",
            "v1.12.3",
            "v1.12.2",
            "v1.12.1",
            "v1.12.0",
            "v1.11.7",
            "v1.11.6",
            "v1.11.5",
            "v1.11.4",
            "v1.11.3",
            "v1.11.2",
            "v1.11.1",
            "v1.11.0",
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            "v1.10.1",
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            "v1.8.6",
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            "v1.8.4",
            "v1.8.3",
            "v1.8.2",
            "v1.8.1",
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            "v1.7.5",
            "v1.7.4",
            "v1.7.3",
            "v1.7.2",
            "v1.7.1",
            "v1.7.0",
            "v1.6.9",
            "v1.6.8",
            "v1.6.7",
            "v1.6.6",
            "v1.6.5",
            "v1.6.4",
            "v1.6.3",
            "v1.6.2",
            "v1.6.1",
            "v1.6.0",
            "v1.5.9",
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            "v1.5.5",
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            "v1.5.1",
            "v1.5.0",
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            "v1.4.7",
            "v1.4.6",
            "v1.4.5",
            "v1.4.4",
            "v1.4.3",
            "v1.4.2",
            "v1.4.1",
            "v1.4.0",
            "v1.3.9",
            "v1.3.8",
            "v1.3.7",
            "v1.3.6",
            "v1.3.5",
            "v1.3.4",
            "v1.3.3",
            "v1.3.2",
            "v1.3.1",
            "v1.3.0",
            "v1.2.9",
            "v1.2.8",
            "v1.2.7",
            "v1.2.6",
            "v1.2.5",
            "v1.2.4",
            "v1.2.3",
            "v1.2.2",
            "v1.2.1",
            "v1.2.0",
            "v1.1.6",
            "v1.1.5",
            "v1.1.4",
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            "v1.1.2",
            "v1.1.1",
            "v1.1.0",
            "v1.0.9",
            "v1.0.8",
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            "v1.0.4",
            "v1.0.3",
            "v1.0.2",
            "v1.0.1",
            "v1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53977.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:32.526770066Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53977.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-53977",
        "https://www.vulncheck.com/advisories/openchamber-unauthenticated-dos-via-api-system-shutdown",
        "https://github.com/openchamber/openchamber/commit/f1b9506132faf6c564a2694c7f33b94421a49b4a",
        "https://github.com/openchamber/openchamber"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-306"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53977.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-53977",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 499700,
  "published_at": "2026-08-06T14:43:37.8+00:00"
}