{"id":"CVE-2026-57978","title":"Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.","summary":"Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing 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","cwe":["CWE-346"],"published":"2026-07-26","updated":"2026-07-26","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-57978","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57978","label":"secure@microsoft.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-07-26T19:13:36.736Z","epss":0.00143,"epssPercentile":0.03971,"vendor":"Microsoft","product":"Microsoft Edge (Chromium-based)","affected":["edge_chromium-based >= 1.0.0.0 < 150.0.4078.99"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-07-27T17:23:52.647028Z"},"slug":"CVE-2026-57978","body":"## Overview\n\nOrigin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.\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":[]}