Semantic Kernel has Arbitrary File Write via AI Agent Function Calling in .NET SDK

NGHIÊM TRỌNG 9.9CVE-2026-25592 · GHSA-2ww3-72rp-wpp4 · PYSEC-2026-531 · Công bố 06/02/2026 · cập nhật 17/06/2026

Tóm tắt nhanh

CVE-2026-25592 là lỗ hổng mức NGHIÊM TRỌNG (CVSS 9.9) ảnh hưởng Microsoft.SemanticKernel.Core, semantic-kernel.
Xác suất bị khai thác trong 30 ngày tới (EPSS): 2.6%, cao hơn 85.1% các lỗ hổng khác.
Cách xử lý: cập nhật lên 1.71.0, 1.39.3 hoặc mới hơn.

Gói / sản phẩm	Phiên bản bị ảnh hưởng	Phiên bản đã vá
Microsoft.SemanticKernel.Core NuGet	`< 1.71.0`	`1.71.0`
semantic-kernel PyPI	`< 1.39.3`	`1.39.3`

Mô tả

Impact

What kind of vulnerability is it? Who is impacted? An Arbitrary File Write vulnerability has been identified in Microsoft's Semantic Kernel .NET SDK, specifically within the SessionsPythonPlugin. Developers who have built applications which include Microsoft's Semantic Kernel .NET SDK and are using the SessionsPythonPlugin

Patches

Has the problem been patched? What versions should users upgrade to? The problem has been fixed in Microsoft.SemanticKernel.Plugins.Core version 1.71.0. Users should upgrade to version 1.71.0 or higher.

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading? Users can create a Function Invocation Filter which checks the arguments being passed to any calls to DownloadFileAsync  or UploadFileAsync and ensures the provided localFilePath is allow listed.

References

Are there any links users can visit to find out more?

Mô tả của NVD

Semantic Kernel is an SDK used to build, orchestrate, and deploy AI agents and multi-agent systems. Prior to 1.71.0, an Arbitrary File Write vulnerability has been identified in Microsoft's Semantic Kernel .NET SDK, specifically within the SessionsPythonPlugin. The problem has been fixed in Microsoft.SemanticKernel.Core version 1.71.0. As a mitigation, users can create a Function Invocation Filter which checks the arguments being passed to any calls to DownloadFileAsync  or UploadFileAsync and ensures the provided localFilePath is allow listed.