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CVE-2026-25592

Semantic Kernel has an Arbitrary File Write via AI Agent Function Calling in .NET SDK

Published: Feb 6, 2026Updated: Feb 19, 2026 Sources: CVE List NVD GHSACWE-22
9.9CRITICAL
NVD MITRE
EPSS Score
2.4%
Top 17.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-22

Affected Products

microsoft
commercial·US
semantic-kernelLibraryLibrary
OSS Libraries / generic-library
PyPI
package-ecosystem
semantic-kernel
OSS Libraries
NuGet
package-ecosystem
Microsoft.SemanticKernel.Core
OSS Libraries

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Collection
Discovery
View detailed technique mapping

References

https://github.com/microsoft/semantic-kernel/blob/main/dotnet/samples/Demos/CodeInterpreterPlugin/Program.cs#L61-L64
github.com
https://github.com/microsoft/semantic-kernel/pull/13478/changes#diff-88d3cacba2bfa84eef8f2aa171b34f9940338cbb784a3ffc49f5fe3af1b8943d
github.com
https://github.com/microsoft/semantic-kernel/security/advisories/GHSA-2ww3-72rp-wpp4
github.com
and 2 more references View all →
News mentions
4

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