🛡️ CVE-2026-25592
🔴 CVSS 9.9 — Critical ✅ No Known Exploit CWE-22 NVD
9.9
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Details

Severity CRITICAL
CVSS Score 9.9
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE CWE-22
Public Exploit âś… No
Source NVD
Published 2026-02-06
Updated 2026-06-02
Modified 2026-02-20
Fix URL N/A

Affected Packages

Software From version Fixed in
microsoft.semantickernel.core — 1.71.0
semantic-kernel — 1.39.3
unknown — —

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