CVE-2026-77490 Microsoft Edge (Chromium-based) Spoofing Vulnerability

{
  "id": "9ace474ba288f2b5d89e2b0eb8a08ef1d35f591f48546859a11d054d26460e4b",
  "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77490",
  "method": "llm",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-77490 Microsoft Edge (Chromium-based) Spoofing Vulnerability",
    "summary": "An input-neutralization flaw in Microsoft Edge (Chromium-based) can let an unauthorized attacker perform spoofing over a network.",
    "evidence": "Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.",
    "products": [
      {
        "name": {
          "value": "Microsoft Edge (Chromium-based)",
          "evidence": "CVE-2026-77490 Microsoft Edge (Chromium-based) Spoofing Vulnerability"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "fixed_cves": [],
    "related_cves": [
      {
        "value": "CVE-2026-77490",
        "evidence": "CVE-2026-77490 Microsoft Edge (Chromium-based) Spoofing Vulnerability"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "official-microsoft-security-updates",
  "document_id": 26387,
  "published_at": "2026-09-11T14:00:00+00:00"
}