{"id":"CVE-2026-66318","title":"Microsoft Edge (Chromium-based) Information Disclosure Vulnerability","summary":"Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C","cvssSource":"cna","cwe":["CWE-346"],"vendor":"Microsoft","product":"Microsoft Edge (Chromium-based)","affected":["edge_chromium-based >= 1.0.0.0 < 151.0.4129.59"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-08-04T00:00:00+00:00"},"published":"2026-08-03","updated":"2026-09-25","sourceUpdated":"2026-09-25T18:19:44.842Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-66318","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66318","label":"Microsoft Edge (Chromium-based) Information Disclosure Vulnerability"}],"tags":["cve.org"],"epss":0.0036,"epssPercentile":0.27153,"ingestedAt":"2026-09-08T17:06:31.933Z","slug":"CVE-2026-66318","body":"## Overview\n\nOrigin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.\n\n## Affected\n\n- `edge_chromium-based >= 1.0.0.0 < 151.0.4129.59`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}