CVE-2026-25592— Semantic Kernel has an Arbitrary File Write via AI Agent Function Calling in .NET SDK
Quick assessment
Affected
microsoft semantic-kernel
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Microsoft Semantic Kernel是美国Microsoft公司的一个大模型编排框架。 Microsoft Semantic Kernel 1.70.0之前版本存在路径遍历漏洞，该漏洞源于SessionsPythonPlugin中存在任意文件写入漏洞。
Possible ATT&CK Techniques 3 AI
T1105 · Ingress Tool Transfer T1059 · Command and Scripting Interpreter T1083 · File and Directory Discovery
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I. Basic Information for CVE-2026-25592
Vulnerability Information
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Vulnerability Title
Semantic Kernel has an Arbitrary File Write via AI Agent Function Calling in .NET SDK
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Semantic Kernel 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Semantic Kernel是美国Microsoft公司的一个大模型编排框架。 Microsoft Semantic Kernel 1.70.0之前版本存在路径遍历漏洞，该漏洞源于SessionsPythonPlugin中存在任意文件写入漏洞。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Shenlong Deep Dive — AI Deep Analysis
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Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| microsoft | semantic-kernel | < 1.71.0 | - |
|
II. Public POCs for CVE-2026-25592
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-25592 (1)
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V. Comments for CVE-2026-25592
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