CVE-2026-26030
Microsoft Semantic Kernel InMemoryVectorStore filter functionality vulnerable to remote code execution
9.9
CRITICAL
CVSS 3.1
EPSS 0.10%
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.
How to fix CVE-2026-26030
To remediate CVE-2026-26030, upgrade the affected package to a fixed version below.
- —upgrade to 1.39.4 or later
- —upgrade to 1.39.4 or later
Is CVE-2026-26030 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1.39.4
- from 0, < 1.39.4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |