{"id":"CVE-2026-66317","title":"Microsoft Edge (Chromium-based) Tampering Vulnerability","summary":"Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform tampering over a network.","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/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":"partial","timestamp":"2026-08-04T14:16:46.570289Z"},"published":"2026-08-03","updated":"2026-09-17","sourceUpdated":"2026-09-17T22:34:25.685Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-66317","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66317","label":"Microsoft Edge (Chromium-based) Tampering Vulnerability"}],"tags":["cve.org"],"epss":0.00143,"epssPercentile":0.03971,"ingestedAt":"2026-09-08T17:06:31.894Z","slug":"CVE-2026-66317","body":"## Overview\n\nOrigin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform tampering 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":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}