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.
Published: 2026-06-22
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Mon, 22 Jun 2026 19:45:00 +0000

Type Values Removed Values Added
Title GitHub Copilot 1.372.0 Filesystem Access Outside Workspace via File-Handler URI

Mon, 22 Jun 2026 18:45:00 +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 16:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-552
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 22 Jun 2026 16:00:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft
Microsoft copilot
Vendors & Products Microsoft
Microsoft copilot

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

Subscriptions

Microsoft Copilot
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-06-22T16:02:08.057Z

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

Link: CVE-2025-66389

cve-icon Vulnrichment

Updated: 2026-06-22T16:02:02.785Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-22T19:30:06Z

Weaknesses