CVE-2025-66389 | GitHub Copilot 1.372.0 allows filesystem access outside of a… | CVSS 7.5 HIGH

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.

Metadata

CVE ID: CVE-2025-66389
State: PUBLISHED
Assigner: mitre
Reserved: 2025-11-28 00:00 UTC
Published: 2026-06-22 00:00 UTC
Last updated: 2026-06-22 16:02 UTC
Primary CWE: CWE-552
CWE-552 Files or Directories Accessible to External Parties
Vendor / Product: n/a / n/a
Sources: cve.org · NVD

Severity & Metrics

7.5 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
n/a	n/a	—	n/a

Weakness (CWE)

CWE	Source	Description
—	cna	n/a
CWE-552	adp	CWE-552 Files or Directories Accessible to External Parties

CVSS scores (1)

Score	Severity	Version	Source	Vector
7.5	HIGH	3.1	adp	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References (3)