Chromium: CVE-2026-78901 Race condition in V8

{
  "id": "ff648cb2cc1298873dce2e61437084b93502f5a3f21e1838b4dfb97a5e295caf",
  "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78901",
  "method": "llm",
  "payload": {
    "kind": "other",
    "title": "Chromium: CVE-2026-78901 Race condition in V8",
    "summary": "The announcement identifies a Chromium vulnerability assigned by Chrome and says Chromium addresses it; it does not document a Microsoft Edge fixed version.",
    "evidence": "Chromium: CVE-2026-78901 Race condition in V8\nThis CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability.",
    "products": [
      {
        "name": {
          "value": "Microsoft Edge (Chromium-based)",
          "evidence": "Microsoft Edge (Chromium-based) ingests Chromium"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "fixed_cves": [],
    "related_cves": [
      {
        "value": "CVE-2026-78901",
        "evidence": "Chromium: CVE-2026-78901 Race condition in V8"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "official-microsoft-security-updates",
  "document_id": 27245,
  "published_at": "2026-08-28T14:00:00+00:00"
}