OpenClaw 2026.4.9 < 2026.4.10 - Denial of Service via Oversized WebSocket Frames in Voice-call Realtime Path

{
  "id": "61bd5308809352b3278bb3a876836db865c3ae02a23a008be6e2b75d56c83d81",
  "url": "https://osv.dev/vulnerability/CVE-2026-42437",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "OpenClaw 2026.4.9 < 2026.4.10 - Denial of Service via Oversized WebSocket Frames in Voice-call Realtime Path",
    "summary": "OpenClaw versions 2026.4.9 before 2026.4.10 contain a denial of service vulnerability in the voice-call realtime WebSocket path that accepts oversized frames without proper validation. Remote attackers can send oversized WebSocket frames to cause service unavailability for deployments exposing the voice-call realtime WebSocket path.",
    "evidence": "osv:CVE-2026-42437",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-42437",
      "aliases": [
        "CVE-2026-42437",
        "GHSA-vw3h-q6xq-jjm5"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openclaw/openclaw",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0512059dd4e6d2e582393828b837c376ddc4719c"
                },
                {
                  "fixed": "44e5b62c27e088128e32e209c146de346c3ea7e6"
                },
                {
                  "fixed": "afadb7dae6738819ad9c7d2597ace0516957d20e"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "2026.4.9"
                      },
                      {
                        "fixed": "2026.4.10"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "afadb7dae6738819ad9c7d2597ace0516957d20e"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2026.4.9"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42437.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.642039987Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42437.json",
        "https://github.com/openclaw/openclaw/security/advisories/GHSA-vw3h-q6xq-jjm5",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-42437",
        "https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-oversized-websocket-frames-in-voice-call-realtime-path",
        "https://github.com/openclaw/openclaw/commit/afadb7dae6738819ad9c7d2597ace0516957d20e"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-770"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42437.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-42437",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 517959,
  "published_at": "2026-05-05T11:24:55.977+00:00"
}