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.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/microsoft/semantic-kernel/blob/main/dotnet/samples/Demos/Code
- https://github.com/microsoft/semantic-kernel/pull/13478/changes#diff-88d3cacba2b
- https://github.com/microsoft/semantic-kernel/security/advisories/GHSA-2ww3-72rp-
FAQ
What is CVE-2026-25592?
CVE-2026-25592 is a vulnerability with a CVSS score of 9.9 (CRITICAL). 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 K...
How severe is CVE-2026-25592?
CVE-2026-25592 has been rated CRITICAL with a CVSS base score of 9.9/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-25592?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.