CVE-2026-25592

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.

Affected products

Semantic-Kernel, Sessionspythonplugin

Fix

Available

CVSS 3.1

9.9 CRITICAL

EPSS

2.4% (83th percentile)

Weakness

CWE-22

NVD status

Deferred

Published

2026-02-06

No exploit for CVE-2026-25592 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.