{"id":"CVE-2026-70309","aliases":[],"cve":{"records":[{"id":"CVE-2026-70309","source":"microsoft","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-08-04T00:01:20.932Z","published":"2026-08-28T17:45:35.711Z","modified":"2026-10-30T17:23:06.073Z"}],"publishers":[{"name":"microsoft","role":"CNA","organizationId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","modified":"2026-10-30T17:23:06.073Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-08-28T20:14:38.366Z"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70309","tags":["vendor-advisory","patch"],"source":"microsoft"}],"weaknesses":[{"id":"CWE-346","description":"CWE-346: Origin Validation Error","source":"microsoft"}],"applicability":[{"source":"microsoft","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:*","versionStartIncluding":"1.0.0.0","versionEndExcluding":"150.0.4078.65"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-08-28T20:14:32.558115Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"title":"Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability","titleSource":"microsoft","descriptionSource":"microsoft","description":"Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to bypass a security feature over a network.","score":5.4,"severity":"medium","published":"2026-08-28T17:45:35.711Z","modified":"2026-10-30T17:23:06.073Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Microsoft","name":"Microsoft Edge (Chromium-based)","platforms":[],"versions":[{"version":"1.0.0.0","status":"affected","lessThan":"150.0.4078.65","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-70309"}],"remediation":[],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70309"],"sources":[{"name":"CVE","id":"CVE-2026-70309","modified":"2026-10-30T17:23:06.073Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-70309"}],"assessments":[{"source":"microsoft","vector":"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","score":5.4}],"sourceAffected":[],"observedAt":"2026-10-30T19:03:55.162Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T00:40:31.812Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-29T01:15:32.966Z","attemptedAt":"2026-10-29T01:15:32.966Z"},{"source":"GHSA","status":"available","checkedAt":"2026-10-29T01:15:33.427Z","attemptedAt":"2026-10-29T01:15:33.427Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-29T01:15:33.427Z","attemptedAt":"2026-10-29T01:15:33.427Z"},{"source":"EPSS","status":"available","checkedAt":"2026-10-29T01:15:33.380Z","attemptedAt":"2026-10-29T01:15:33.380Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-70309","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-70309","modified":"2026-08-31T22:29:18.250","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","checkedAt":"2026-10-29T01:15:32.966Z"},{"source":"FIRST EPSS","id":"CVE-2026-70309","url":"https://www.first.org/epss/","probability":0.00212,"percentile":0.11433,"date":"2026-10-28","checkedAt":"2026-10-29T01:15:33.380Z"},{"source":"GitHub Advisory Database","id":"GHSA-j3c8-38vp-j837","url":"https://github.com/advisories/GHSA-j3c8-38vp-j837","modified":"2026-08-28T21:31:24Z","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","checkedAt":"2026-10-29T01:15:33.427Z"},{"source":"ENISA EUVD","id":"EUVD-2026-67853","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-67853","modified":"Oct 28, 2026, 8:08:45 PM","score":5.4,"vector":"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","checkedAt":"2026-10-29T01:15:33.427Z"}],"aiSummary":{"text":"Microsoft Edge (Chromium-based) versions before 150.0.4078.65 have an origin validation error, allowing an attacker to bypass a security feature over a network. The vulnerability is identified as CWE-346.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T09:05:58.557Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-70309"}]}}