{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-66313", "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "state": "PUBLISHED", "assignerShortName": "microsoft", "dateReserved": "2026-07-24T18:06:51.295Z", "datePublished": "2026-08-03T22:53:11.479Z", "dateUpdated": "2026-08-03T22:54:01.322Z"}, "containers": {"cna": {"title": "Microsoft Edge (Chromium-based) Tampering Vulnerability", "datePublic": "2026-07-31T14:00:00.000Z", "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:*", "versionStartIncluding": "1.0.0.0", "versionEndExcluding": "151.0.4129.59"}]}]}], "affected": [{"vendor": "Microsoft", "product": "Microsoft Edge (Chromium-based)", "versions": [{"version": "1.0.0.0", "lessThan": "151.0.4129.59", "versionType": "custom", "status": "affected"}]}], "descriptions": [{"value": "Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform tampering locally.", "lang": "en-US"}], "problemTypes": [{"descriptions": [{"description": "CWE-346: Origin Validation Error", "lang": "en-US", "type": "CWE", "cweId": "CWE-346"}]}], "providerMetadata": {"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "shortName": "microsoft", "dateUpdated": "2026-08-03T22:54:01.322Z"}, "references": [{"name": "Microsoft Edge (Chromium-based) Tampering Vulnerability", "tags": ["vendor-advisory", "patch"], "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66313"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en-US", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "baseSeverity": "MEDIUM", "baseScore": 6.8, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C"}}]}}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[1.0.0.0,151.0.4129.59)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Microsoft Edge (Chromium-based)", "source": "cna", "vendor": "Microsoft"}, "product": "edge_chromium", "vendor": "microsoft"}], "created": "2026-08-04T00:30:18.175722+00:00", "updated": "2026-08-04T00:30:18.175749+00:00", "vendors": ["microsoft", "microsoft$PRODUCT$edge_chromium"]}