CVE-2025-66389

HIGH EPSS 27.9%
Published Jun 22, 20261w ago · Modified Jun 22, 20261w ago
7.5 CVSS 3.1
High
Find Similar
Published Jun 22, 2026 1w ago
Last Modified Jun 22, 2026 1w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
27.9% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-552

References 3

  • blindcyber.com https://blindcyber.com/2025/10/28/copilot-fun/
  • github.com https://github.com/microsoft/vscode-copilot-chat/
  • github.com https://github.com/microsoft/vscode/blob/03baef1008086ed4960042fa463e570072173bb5/src/vs/workbench/contrib/chat/electron-browser/tools/fetchPageTool.ts#L152

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.