Python
CVE-2026-25592
CRITICAL
GHSA-2ww3-72rp-wpp4
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionGitHub Advisory
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.
AnalysisAI
Microsoft Semantic Kernel SDK has a CVSS 9.9 path traversal vulnerability enabling AI agents to access arbitrary files outside their intended scope.
Technical ContextAI
Semantic Kernel, Microsoft's SDK for building AI agents, has a CWE-22 path traversal that allows AI agents to read or write files outside their intended directory scope.
Affected ProductsAI
Microsoft Semantic Kernel SDK
RemediationAI
Update Semantic Kernel. Implement strict file path validation for AI agent file operations.
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External POC / Exploit Code
Leaving vuln.today