CVE-2026-26030HighMicrosoft CVSS 9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C

Microsoft security update for CVE-2026-26030 — Microsoft Semantic Kernel Python SDK

Published
May 31, 2026
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2026-26030 →

📋 Microsoft's advisory

EchelonGraph does not copy Microsoft's advisory page: its FAQ and remediation text are not shown here. Read the advisory on https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26030. This page also shows what EchelonGraph holds for CVE-2026-26030, with the description from its CVE record, which the CVE Numbering Authority that assigned the CVE wrote: for a CVE Microsoft assigned, often in the words of Microsoft's own advisory.

🎯 Affected products1

  • Microsoft Semantic Kernel Python SDK

✅ Updates Microsoft lists: 2 updates

2 rows: one per KB article or update, update type and fixed build. Their details are on Microsoft's advisory.

KB articleUpdateFixed build
—Source Code (.zip)1.39.4
—Source Code (tar.gz)1.39.4

🧭 EchelonGraph on CVE-2026-26030

EchelonGraph score
9.9 CRITICAL
CISA KEV
Not listed
Fix status
A fix is available — apply it.

Description from the CVE record (CVE.org), as published by its numbering authority

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.

Published by GitHub, Inc., the CVE Numbering Authority that assigned CVE-2026-26030, in its CVE record at CVE.org; reused under the CVE Program's Terms of Use (its licence and MITRE's copyright notice are in our Terms of Service).

🔗 References (4)