CVE-2025-66389
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Microsoft Github Copilot
PublishedJun 22, 2026
First seenJun 22, 2026
Weakness typeCWE-552CWE-552
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft github_copilot | 1.372.0 | — |
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