{"id":"CVE-2026-58616","title":"Copilot Chat (Microsoft Edge) Information Disclosure Vulnerability","summary":"Concurrent execution using shared resource with improper synchronization ('race condition') in Copilot Chat (Microsoft Edge) allows an authorized attacker to disclose information over a network.","severity":"medium","cvss":4.4,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C","cvssSource":"cna","cwe":["CWE-362"],"vendor":"Microsoft","product":"Microsoft Edge (Chromium-based)","affected":["edge_chromium-based -","edge_for_android >= 1.0.0.0 < 152.0.4191.52","edge_for_ios >= 1.0.0.0 < 152.0.4191.52","edge_for_linux >= 1.0.0 < 152.0.4191.52","edge_for_mac >= 1.0.0.0 < 152.0.4191.52","edge_for_windows >= 1.0.0.0 < 152.0.4191.52"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-08-28T20:15:16.258744Z"},"published":"2026-08-28","updated":"2026-09-16","sourceUpdated":"2026-09-16T16:25:12.179Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-58616","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58616","label":"Copilot Chat (Microsoft Edge) Information Disclosure Vulnerability"}],"tags":["cve.org"],"epss":0.00221,"epssPercentile":0.12878,"ingestedAt":"2026-09-12T20:03:06.206Z","slug":"CVE-2026-58616","body":"## Overview\n\nConcurrent execution using shared resource with improper synchronization ('race condition') in Copilot Chat (Microsoft Edge) allows an authorized attacker to disclose information over a network.\n\n## Affected\n\n- `edge_chromium-based -`\n- `edge_for_android >= 1.0.0.0 < 152.0.4191.52`\n- `edge_for_ios >= 1.0.0.0 < 152.0.4191.52`\n- `edge_for_linux >= 1.0.0 < 152.0.4191.52`\n- `edge_for_mac >= 1.0.0.0 < 152.0.4191.52`\n- `edge_for_windows >= 1.0.0.0 < 152.0.4191.52`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":24.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}