{"cve":"CVE-2026-25592","nvd":{"published":"2026-02-06T21:16:17.647","modified":"2026-06-17T10:24:55.030","status":"Deferred","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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","score":9.9},"cwes":["CWE-22"],"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"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:22:27.261130201+00:00"},"epss":{"cve":"CVE-2026-25592","score":0.02559,"percentile":0.85082,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-2ww3-72rp-wpp4","url":"https://osv.dev/vulnerability/GHSA-2ww3-72rp-wpp4","summary":"Semantic Kernel has Arbitrary File Write via AI Agent Function Calling in .NET SDK","modified":"2026-06-29T12:26:18.466664657Z","packages":[{"ecosystem":"PyPI","name":"semantic-kernel","purl":"pkg:pypi/semantic-kernel","ranges":["<1.39.3"],"fixed":["1.39.3"]},{"ecosystem":"NuGet","name":"Microsoft.SemanticKernel.Core","purl":"pkg:nuget/Microsoft.SemanticKernel.Core","ranges":["<1.71.0"],"fixed":["1.71.0"]}]},{"id":"PYSEC-2026-531","url":"https://osv.dev/vulnerability/PYSEC-2026-531","summary":"Semantic Kernel has Arbitrary File Write via AI Agent Function Calling in .NET SDK","modified":"2026-07-01T20:23:04.850413Z","packages":[{"ecosystem":"PyPI","name":"semantic-kernel","purl":"pkg:pypi/semantic-kernel","ranges":["<1.39.3"],"fixed":["1.39.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}