Nezha 2.0.13 before 2.3.15 Denial of Service via /api/v1/ws/transfer WebSocket

{
  "id": "f3dfd05633f129ce924d6128d48138dc2d134d1f489f240d33a7df67d40c7993",
  "url": "https://osv.dev/vulnerability/CVE-2026-111383",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Nezha 2.0.13 before 2.3.15 Denial of Service via /api/v1/ws/transfer WebSocket",
    "summary": "Nezha from 2.0.13 before 2.3.15 contains a resource exhaustion vulnerability that allows authenticated users to open unbounded concurrent connections to the /api/v1/ws/transfer WebSocket endpoint. Attackers can hold thousands of subscriptions created by ServerTransferClass.Subscribe without limits, exhausting file descriptors, memory, and goroutines and blocking agent gRPC reconnections.",
    "evidence": "osv:CVE-2026-111383",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-111383",
      "aliases": [
        "CVE-2026-111383",
        "GHSA-ch6h-w872-77mx"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nezhahq/nezha",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1e0f479bb5bdef400a79303d470b3d51c8f48a5d"
                },
                {
                  "fixed": "36b742a7e9a81ed782363dd19efd77b7030fbd0f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "2.0.13"
                      },
                      {
                        "fixed": "2.3.15"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "36b742a7e9a81ed782363dd19efd77b7030fbd0f"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2.0.13"
                      },
                      {
                        "fixed": "2.3.15"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-111383.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:22.750002154Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111383.json",
        "https://github.com/nezhahq/nezha/security/advisories/GHSA-ch6h-w872-77mx",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-111383",
        "https://www.vulncheck.com/advisories/nezha-2.0.13-before-2.3.15-denial-of-service-via-api-v1-ws-transfer-websocket",
        "https://github.com/nezhahq/nezha/commit/36b742a7e9a81ed782363dd19efd77b7030fbd0f"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-770"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111383.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-111383",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 489237,
  "published_at": "2026-10-16T01:17:52.239+00:00"
}