CVE-2025-66389

high Microsoft
CVSS v3 Base Score
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS Score
0.4%
Exploitation probability in 30 days
Top 72% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
None
Availability
None
Published: June 22, 2026 (17 days ago)
Last Modified: June 30, 2026
Vendor: Microsoft
Source: NVD

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.

CWE

CWE-552

Affected Products

microsoft github copilot

References

🔗 blindcyber.com 🔗 github.com 🔗 github.com