{"id":"CVE-2025-66389","title":"GitHub Copilot 1.372.0 allows filesystem access outside of a workspace folder (without user approval) via a file-handler URI parameter to fetch_webpage","summary":"GitHub Copilot 1.372.0 allows filesystem access outside of a workspace folder (without user approval) via a file-handler URI parameter to fetch_webpage. Therefore, exfiltration could occur if there is indirect prompt injection.","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-552"],"vendor":"microsoft","product":"github_copilot","affected":["github_copilot = 1.372.0"],"published":"2026-06-22","updated":"2026-10-05","sourceUpdated":"2026-10-05T18:10:00.200","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-66389","references":[{"url":"https://blindcyber.com/2025/10/28/copilot-fun/","label":"cve@mitre.org"},{"url":"https://github.com/microsoft/vscode-copilot-chat/","label":"cve@mitre.org"},{"url":"https://github.com/microsoft/vscode/blob/03baef1008086ed4960042fa463e570072173bb5/src/vs/workbench/contrib/chat/electron-browser/tools/fetchPageTool.ts#L152","label":"cve@mitre.org"}],"tags":["nvd"],"epss":0.01176,"epssPercentile":0.66513,"ingestedAt":"2026-10-05T18:29:11.170Z","slug":"CVE-2025-66389","body":"## Overview\n\nGitHub Copilot 1.372.0 allows filesystem access outside of a workspace folder (without user approval) via a file-handler URI parameter to fetch_webpage. Therefore, exfiltration could occur if there is indirect prompt injection.\n\n## Affected\n\n- `github_copilot = 1.372.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}