CVE-2026-25592CRITICAL 9.9EPSS p77.6%
CVE-2026-25592CVE-2026-25592
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.
Scoring
| CVSS 3.1 | 9.9 (CRITICAL) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| EPSS | 1.95% probability of exploitation · percentile 77.6% · 2026-06-18T12:00:27Z |
| Published | 2026-02-06 |
| Last modified | 2026-04-15 |
Underlying weaknesses· 1
References
- https://github.com/microsoft/semantic-kernel/blob/main/dotnet/samples/Demos/CodeInterpreterPlugin/Program.cs#L61-L64
- https://github.com/microsoft/semantic-kernel/pull/13478/changes#diff-88d3cacba2bfa84eef8f2aa171b34f9940338cbb784a3ffc49f5fe3af1b8943d
- https://github.com/microsoft/semantic-kernel/security/advisories/GHSA-2ww3-72rp-wpp4
1
| Type | Target | Confidence | Tier |
|---|---|---|---|
| Weakness | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')cwe-22 | 0% | live |
Related by meaning· 6
Nearest entities by semantic similarity across the cs-graph corpus.