{"id":"CVE-2026-66318","aliases":["EUVD-2026-52521","GHSA-wx3x-ccqc-xq62"],"status":"published","title":"Microsoft Edge (Chromium-based) Information Disclosure Vulnerability","description":"Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.","severity":{"version":"3.1","score":8.1,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.0036,"percentile":0.30239,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-346"],"published":"2026-08-03T22:51:43Z","modified":"2026-11-10T22:34:59Z","products":[{"vendor":"microsoft","product":"edge_chromium"},{"vendor":"microsoft","product":"microsoft edge (chromium-based)"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66318","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66318"},{"url":"https://github.com/advisories/GHSA-wx3x-ccqc-xq62"}],"sources":{"cve":[{"id":"CVE-2026-66318","title":"Microsoft Edge (Chromium-based) Information Disclosure Vulnerability","description":"Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-08-03T22:51:43.716Z","modified":"2026-11-10T22:34:59.489Z","cvss":[{"version":"3.1","score":8.1,"vector":"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","level":"high","assessor":"cna"}],"cwes":["CWE-346"],"updated_at":"2026-11-10T23:49:30.334266Z"}],"euvd":[{"id":"EUVD-2026-52521","description":"Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-08-03T22:51:43Z","modified":"2026-11-10T22:34:59Z","cvss":[{"version":"3.1","score":8.1,"vector":"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","level":"high"}],"updated_at":"2026-11-10T23:24:16.163953Z"}],"ghsa":[{"id":"GHSA-wx3x-ccqc-xq62","title":"Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to...","description":"Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-08-04T00:34:55Z","modified":"2026-08-04T00:35:01Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-346"],"updated_at":"2026-11-02T15:10:03.433591Z"}],"nvd":[{"id":"CVE-2026-66318","description":"Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.","status":"published","published":"2026-08-04T00:17:39.317Z","modified":"2026-10-23T23:10:00.157Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-346"],"updated_at":"2026-11-02T14:12:34.643497Z"}]}}