High severity7.5NVD Advisory· Published Jun 22, 2026· Updated Jun 30, 2026

CVE-2025-66389

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Microsoft/Github Copilot
cpe:2.3:a:microsoft:github_copilot:1.372.0:*:*:*:*:visual_studio_code:*:*
Microsoft/vscode-copilot-chatllm-create
Range: =1.372.0
GitHub/Copilotllm-fuzzy
Range: =1.372.0
Microsoft/Vscodellm-fuzzy
Range: =1.372.0

Patches

Vulnerability mechanics

References

blindcyber.com/2025/10/28/copilot-fun/nvdExploitThird Party Advisory
github.com/microsoft/vscode/blob/03baef1008086ed4960042fa463e570072173bb5/src/vs/workbench/contrib/chat/electron-browser/tools/fetchPageTool.tsnvdProduct

News mentions

No linked articles in our index yet.

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