Critical severityNVD Advisory· Published Feb 19, 2026· Updated Feb 26, 2026
Microsoft Semantic Kernel InMemoryVectorStore filter functionality vulnerable to remote code execution
CVE-2026-26030
Description
Semantic Kernel, Microsoft's semantic kernel Python SDK, has a remote code execution vulnerability in versions prior to 1.39.4, specifically within the InMemoryVectorStore filter functionality. The problem has been fixed in version python-1.39.4. Users should upgrade this version or higher. As a workaround, avoid using InMemoryVectorStore for production scenarios.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
semantic-kernelPyPI | < 1.39.4 | 1.39.4 |
Affected products
1- Range: < 1.39.4
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
5- github.com/advisories/GHSA-xjw9-4gw8-4rqxghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-26030ghsaADVISORY
- github.com/microsoft/semantic-kernel/pull/13505ghsax_refsource_MISCWEB
- github.com/microsoft/semantic-kernel/releases/tag/python-1.39.4ghsax_refsource_MISCWEB
- github.com/microsoft/semantic-kernel/security/advisories/GHSA-xjw9-4gw8-4rqxghsax_refsource_CONFIRMWEB
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