Vulnerability record · CVE-2026-26030 · published 19 February 2026

CVE-2026-26030: Microsoft semantic kernel code injection vulnerability

Microsoft · Semantic Kernel

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.

9.9 CVSS 3.1 Critical EPSS 3.7% · top 10.7% CWE-94 · Code injection

9.9CVSS 3.1 base score

3.7%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

3References

17 Jun 2026Last modified by NVD

Description

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Semantic Kernel Microsoft

References

Link	Tags
https://github.com/microsoft/semantic-kernel/pull/13505	Issue TrackingPatch
https://github.com/microsoft/semantic-kernel/releases/tag/python-1.39.4	Release Notes
https://github.com/microsoft/semantic-kernel/security/advisories/GHSA-xjw9-4gw8-4rqx	PatchVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-26030), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.