{"id":"CVE-2026-66311","state":"PUBLISHED","title":"Microsoft Edge (Chromium-based) Tampering Vulnerability","description":"Missing authorization in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform tampering locally.","publishedAt":"2026-08-03T22:57:53.525Z","updatedAt":"2026-10-28T20:07:05.874Z","severity":{"score":6.2,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","source":"microsoft"},"assigner":"microsoft","products":["Microsoft Microsoft Edge (Chromium-based)"],"affected":[{"vendor":"Microsoft","product":"Microsoft Edge (Chromium-based)","versions":[{"version":"1.0.0.0","status":"affected","lessThan":"151.0.4129.59","versionType":"custom"}]}],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66311"],"weaknesses":["CWE-862"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/66xxx/CVE-2026-66311.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-66311","state":"PUBLISHED","datePublished":"2026-08-03T22:57:53.525Z","dateUpdated":"2026-10-28T20:07:05.874Z","assignerShortName":"microsoft","assignerOrgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","dateReserved":"2026-07-24T18:06:51.295Z"},"containers":{"cna":{"title":"Microsoft Edge (Chromium-based) Tampering Vulnerability","descriptions":[{"lang":"en-US","value":"Missing authorization in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform tampering locally."}],"affected":[{"vendor":"Microsoft","product":"Microsoft Edge (Chromium-based)","versions":[{"version":"1.0.0.0","status":"affected","lessThan":"151.0.4129.59","versionType":"custom"}]}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66311","name":"Microsoft Edge (Chromium-based) Tampering Vulnerability","tags":["vendor-advisory","patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en-US","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","baseSeverity":"MEDIUM","baseScore":6.2,"vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-862","description":"CWE-862: Missing Authorization","lang":"en-US","type":"CWE"}]}],"providerMetadata":{"shortName":"microsoft","orgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","dateUpdated":"2026-10-28T20:07:05.874Z"},"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"}]}]}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-04T14:19:46.424821Z","id":"CVE-2026-66311","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-04T15:04:33.096Z"}}]}}}