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.

Metrics

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

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Vendors Products
References
Link Providers
https://blindcyber.com/2025/10/28/copilot-fun/ cve-icon
https://github.com/microsoft/vscode-copilot-chat/ cve-icon
https://github.com/microsoft/vscode/blob/03baef1008086ed4960042fa463e570072173bb5/src/vs/workbench/contrib/chat/electron-browser/tools/fetchPageTool.ts#L152 cve-icon
History

Mon, 22 Jun 2026 14:45:00 +0000

Type Values Removed Values Added
Title Filesystem Exfiltration via Unauthorized File-Handler URI in GitHub Copilot
Weaknesses CWE-200
CWE-284

Mon, 22 Jun 2026 13:45:00 +0000

Type Values Removed Values Added
Description 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.
References
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-06-22T13:38:54.583Z

Reserved: 2025-11-28T00:00:00.000Z

Link: CVE-2025-66389

cve-icon Vulnrichment

No data.

cve-icon NVD

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cve-icon Redhat

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cve-icon OpenCVE Enrichment

Updated: 2026-06-22T14:30:05Z