GHSA-2WW3-72RP-WPP4

Vulnerability from github – Published: 2026-02-06 18:37 – Updated: 2026-02-06 21:43
VLAI?
Summary
Semantic Kernel has Arbitrary File Write via AI Agent Function Calling in .NET SDK
Details

Impact

What kind of vulnerability is it? Who is impacted?

An Arbitrary File Write vulnerability has been identified in Microsoft's Semantic Kernel .NET SDK, specifically within the SessionsPythonPlugin. Developers who have built applications which include Microsoft's Semantic Kernel .NET SDK and are using the SessionsPythonPlugin.

Patches

Has the problem been patched? What versions should users upgrade to?

The problem has been fixed in Microsoft.SemanticKernel.Core version 1.70.0. Users should upgrade to version 1.70.0 or higher.

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?

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.

References

Are there any links users can visit to find out more? - Sample showing safe use of the CodeInterpreterPlugin - PR to Add file upload security controls to SessionsPythonPlugin

Severity ?
9.9 (Critical)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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{
  "affected": [
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.SemanticKernel.Core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.70.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "semantic-kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.39.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-25592"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-06T18:37:24Z",
    "nvd_published_at": "2026-02-06T21:16:17Z",
    "severity": "CRITICAL"
  },
  "details": "### Impact\n_What kind of vulnerability is it? Who is impacted?_\n\nAn Arbitrary File Write vulnerability has been identified in Microsoft\u0027s Semantic Kernel\u202f.NET SDK, specifically within the\u202f`SessionsPythonPlugin`.\nDevelopers who have built applications which include Microsoft\u0027s Semantic Kernel\u202f.NET SDK and are using the `SessionsPythonPlugin`.\n\n### Patches\n_Has the problem been patched? What versions should users upgrade to?_\n\nThe problem has been fixed in [Microsoft.SemanticKernel.Core version 1.70.0](https://www.nuget.org/packages/Microsoft.SemanticKernel.Core/1.70.0). Users should upgrade to version 1.70.0 or higher.\n\n### Workarounds\n_Is there a way for users to fix or remediate the vulnerability without upgrading?_\n\nUsers can create a [Function Invocation Filter](https://learn.microsoft.com/en-us/semantic-kernel/concepts/enterprise-readiness/filters?pivots=programming-language-csharp#function-invocation-filter) which checks the arguments being passed to any calls to `DownloadFileAsync\u202f` or `UploadFileAsync` and ensures the provided `localFilePath` is allow listed.\n\n### References\n_Are there any links users can visit to find out more?_\n- [Sample showing safe use of the CodeInterpreterPlugin](https://github.com/microsoft/semantic-kernel/blob/main/dotnet/samples/Demos/CodeInterpreterPlugin/Program.cs#L61-L64)\n- [PR to Add file upload security controls to SessionsPythonPlugin](https://github.com/microsoft/semantic-kernel/pull/13478/changes#diff-88d3cacba2bfa84eef8f2aa171b34f9940338cbb784a3ffc49f5fe3af1b8943d)",
  "id": "GHSA-2ww3-72rp-wpp4",
  "modified": "2026-02-06T21:43:53Z",
  "published": "2026-02-06T18:37:24Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/microsoft/semantic-kernel/security/advisories/GHSA-2ww3-72rp-wpp4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25592"
    },
    {
      "type": "WEB",
      "url": "https://github.com/microsoft/semantic-kernel/pull/13478/changes#diff-88d3cacba2bfa84eef8f2aa171b34f9940338cbb784a3ffc49f5fe3af1b8943d"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/microsoft/semantic-kernel"
    },
    {
      "type": "WEB",
      "url": "https://github.com/microsoft/semantic-kernel/blob/main/dotnet/samples/Demos/CodeInterpreterPlugin/Program.cs#L61-L64"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Semantic Kernel has Arbitrary File Write via AI Agent Function Calling in .NET SDK"
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.