{"id":"CVE-2026-21523","aliases":["EUVD-2026-7345"],"status":"published","title":"GitHub Copilot and Visual Studio Code Remote Code Execution Vulnerability","description":"Time-of-check time-of-use (toctou) race condition in GitHub Copilot and Visual Studio allows an authorized attacker to execute code over a network.","severity":{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00764,"percentile":0.55832,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-367"],"published":"2026-02-10T17:51:25Z","modified":"2026-10-24T10:30:54Z","products":[{"vendor":"microsoft","product":"microsoft visual studio code copilot chat extension"},{"vendor":"microsoft","product":"visual studio code"},{"vendor":"microsoft","product":"visual_studio_code"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21523","tags":["vendor-advisory","patch","Vendor Advisory","advisory"]}],"sources":{"cve":[{"id":"CVE-2026-21523","title":"GitHub Copilot and Visual Studio Code Remote Code Execution Vulnerability","description":"Time-of-check time-of-use (toctou) race condition in GitHub Copilot and Visual Studio allows an authorized attacker to execute code over a network.","status":"published","published":"2026-02-10T17:51:25.077Z","modified":"2026-08-19T16:26:20.581Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T13:41:42.05254Z"}],"euvd":[{"id":"EUVD-2026-7345","description":"Time-of-check time-of-use (toctou) race condition in GitHub Copilot and Visual Studio allows an authorized attacker to execute code over a network.","status":"published","published":"2026-02-10T17:51:25Z","modified":"2026-08-19T16:26:20Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-02T18:01:44.172516Z"}],"nvd":[{"id":"CVE-2026-21523","description":"Time-of-check time-of-use (toctou) race condition in GitHub Copilot and Visual Studio allows an authorized attacker to execute code over a network.","status":"published","published":"2026-02-10T18:16:34.743Z","modified":"2026-06-17T10:18:46.783Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T14:12:05.908608Z"}],"osv":[{"id":"CVE-2026-21523","description":"Time-of-check time-of-use (toctou) race condition in GitHub Copilot and Visual Studio allows an authorized attacker to execute code over a network.","status":"published","published":"2026-02-10T18:16:34.743Z","modified":"2026-10-24T10:30:54.638545854Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:58.42038Z"}]}}