{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-20942", "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "state": "PUBLISHED", "assignerShortName": "microsoft", "dateReserved": "2025-12-04T20:04:16.338Z", "datePublished": "2026-10-29T15:21:46.978Z", "dateUpdated": "2026-10-29T15:21:46.978Z"}, "containers": {"cna": {"title": "Microsoft Edge (Chromium-based) Spoofing Vulnerability", "datePublic": "2026-10-27T14:00:00.000Z", "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:*", "versionStartIncluding": "1.0.0.0", "versionEndExcluding": "156.0.4314.42"}]}]}], "affected": [{"vendor": "Microsoft", "product": "Microsoft Edge (Chromium-based)", "versions": [{"version": "1.0.0.0", "lessThan": "156.0.4314.42", "versionType": "custom", "status": "affected"}]}], "descriptions": [{"value": "Improper restriction of rendered ui layers or frames in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.", "lang": "en-US"}], "problemTypes": [{"descriptions": [{"description": "CWE-1021: Improper Restriction of Rendered UI Layers or Frames", "lang": "en-US", "type": "CWE", "cweId": "CWE-1021"}]}], "providerMetadata": {"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "shortName": "microsoft", "dateUpdated": "2026-10-29T15:21:46.978Z"}, "references": [{"name": "Microsoft Edge (Chromium-based) Spoofing Vulnerability", "tags": ["vendor-advisory", "patch"], "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20942"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en-US", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "baseSeverity": "MEDIUM", "baseScore": 4.3, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C"}}]}}}

{}

{"affected": [{"affectedData": [{"product": "Microsoft Edge (Chromium-based)", "vendor": "Microsoft", "versions": [{"lessThan": "156.0.4314.42", "status": "affected", "version": "1.0.0.0", "versionType": "custom"}]}], "source": "secure@microsoft.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper restriction of rendered ui layers or frames in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network."}], "id": "CVE-2026-20942", "lastModified": "2026-10-29T16:18:08.703", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "secure@microsoft.com", "type": "Primary"}]}, "published": "2026-10-29T16:18:08.593", "references": [{"source": "secure@microsoft.com", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20942"}], "sourceIdentifier": "secure@microsoft.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-1021"}], "source": "secure@microsoft.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[1.0.0.0,156.0.4314.42)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Microsoft Edge (Chromium-based)", "source": "cna", "vendor": "Microsoft"}, "product": "edge_chromium", "vendor": "microsoft"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[1.0.0.0,156.0.4314.42)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Microsoft Edge (Chromium-based)", "source": "cna", "vendor": "Microsoft"}, "product": "microsoft_edge_(chromium-based)", "vendor": "microsoft"}], "created": "2026-10-29T17:30:14.527445+00:00", "updated": "2026-10-29T18:15:14.666288+00:00", "vendors": ["microsoft", "microsoft$PRODUCT$edge_chromium", "microsoft$PRODUCT$microsoft_edge_(chromium-based)"]}