{"id":"CVE-2026-58616","aliases":["EUVD-2026-67847","GHSA-c7hh-86mm-w7m5"],"status":"published","title":"Copilot Chat (Microsoft Edge) Information Disclosure Vulnerability","description":"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":{"version":"3.1","score":4.4,"vector":"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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00295,"percentile":0.2229,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-362"],"published":"2026-08-28T17:43:49Z","modified":"2026-11-10T21:59:26Z","products":[{"vendor":"microsoft","product":"edge_chromium"},{"vendor":"microsoft","product":"microsoft edge (chromium-based)"},{"vendor":"microsoft","product":"microsoft edge for android"},{"vendor":"microsoft","product":"microsoft edge for ios"},{"vendor":"microsoft","product":"microsoft edge for linux"},{"vendor":"microsoft","product":"microsoft edge for mac"},{"vendor":"microsoft","product":"microsoft edge for windows"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58616","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-58616"},{"url":"https://github.com/advisories/GHSA-c7hh-86mm-w7m5"}],"sources":{"cve":[{"id":"CVE-2026-58616","title":"Copilot Chat (Microsoft Edge) Information Disclosure Vulnerability","description":"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.","status":"published","published":"2026-08-28T17:43:49.732Z","modified":"2026-11-10T21:59:26.546Z","cvss":[{"version":"3.1","score":4.4,"vector":"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","level":"medium","assessor":"cna"}],"cwes":["CWE-362"],"updated_at":"2026-11-10T22:48:51.483784Z"}],"euvd":[{"id":"EUVD-2026-67847","description":"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.","status":"published","published":"2026-08-28T17:43:49Z","modified":"2026-11-10T21:59:26Z","cvss":[{"version":"3.1","score":4.4,"vector":"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","level":"medium"}],"updated_at":"2026-11-10T23:24:17.329747Z"}],"ghsa":[{"id":"GHSA-c7hh-86mm-w7m5","title":"Concurrent execution using shared resource with improper synchronization ('race condition') in...","description":"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.","status":"published","published":"2026-08-28T21:31:16Z","modified":"2026-08-28T21:31:24Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T15:11:08.095363Z"}],"nvd":[{"id":"CVE-2026-58616","description":"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.","status":"published","published":"2026-08-28T20:18:44.927Z","modified":"2026-10-28T21:16:58.457Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":3,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T14:12:42.366888Z"}]}}