CVE-2025-66389

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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://blindcyber.com/2025/10/28/copilot-fun/	Exploit Third Party Advisory
https://github.com/microsoft/vscode-copilot-chat/	Product
https://github.com/microsoft/vscode/blob/03baef1008086ed4960042fa463e570072173bb5/src/vs/workbench/contrib/chat/electron-browser/tools/fetchPageTool.ts#L152	Product

Configurations

Configuration 1 (hide)

cpe:2.3:a:microsoft:github_copilot:1.372.0:*:*:*:*:visual_studio_code:*:*

History

05 Oct 2026, 18:10

Type	Values Removed	Values Added
Summary		(es) GitHub Copilot 1.372.0 permite acceso al sistema de archivos fuera de una carpeta de espacio de trabajo (sin aprobación del usuario) a través de un parámetro URI de gestor de archivos para fetch_webpage. Por lo tanto, podría producirse una exfiltración si hay inyección de prompt indirecta.

Information

Published : 2026-06-22 14:16

Updated : 2026-10-12 22:10

NVD link : CVE-2025-66389

Mitre link : CVE-2025-66389

CVE.ORG link : CVE-2025-66389

JSON object : View

Products Affected

microsoft

github_copilot

CWE

CWE-552

Files or Directories Accessible to External Parties

{"id": "CVE-2025-66389", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-66389", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-22T16:01:16.938063Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "cve@mitre.org", "affectedData": [{"vendor": "n/a", "product": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}]}], "published": "2026-06-22T14:16:24.073", "references": [{"url": "https://blindcyber.com/2025/10/28/copilot-fun/", "tags": ["Exploit", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://github.com/microsoft/vscode-copilot-chat/", "tags": ["Product"], "source": "cve@mitre.org"}, {"url": "https://github.com/microsoft/vscode/blob/03baef1008086ed4960042fa463e570072173bb5/src/vs/workbench/contrib/chat/electron-browser/tools/fetchPageTool.ts#L152", "tags": ["Product"], "source": "cve@mitre.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-552"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "GitHub Copilot 1.372.0 permite acceso al sistema de archivos fuera de una carpeta de espacio de trabajo (sin aprobaci\u00f3n del usuario) a trav\u00e9s de un par\u00e1metro URI de gestor de archivos para fetch_webpage. Por lo tanto, podr\u00eda producirse una exfiltraci\u00f3n si hay inyecci\u00f3n de prompt indirecta."}], "lastModified": "2026-10-12T22:10:00.247", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:github_copilot:1.372.0:*:*:*:*:visual_studio_code:*:*", "vulnerable": true, "matchCriteriaId": "CE548532-32B9-4755-90E4-71FD6CC4314D"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}