CVE-2026-26030

CRITICAL

9.9

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.

CVE Details

CVSS v3.1 Score9.9

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published2/19/2026

Last Modified3/3/2026

Sourcenvd

Honeypot Sightings0

Affected Products

microsoft:semantic_kernel

Weaknesses (CWE)

CWE-94

References

https://github.com/microsoft/semantic-kernel/pull/13505(security-advisories@github.com)

https://github.com/microsoft/semantic-kernel/releases/tag/python-1.39.4(security-advisories@github.com)

https://github.com/microsoft/semantic-kernel/security/advisories/GHSA-xjw9-4gw8-4rqx(security-advisories@github.com)

IOC Correlations

No correlations recorded

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