CVE-2026-26030 PUBLISHED

Microsoft Semantic Kernel InMemoryVectorStore filter functionality vulnerable to remote code execution

Assigner: GitHub_M
Reserved: 09.02.2026 Published: 19.02.2026 Updated: 20.02.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS Score: 10

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	microsoft
Product	semantic-kernel
Versions	Version < 1.39.4 is affected

References

Problem Types

CWE-94: Improper Control of Generation of Code ('Code Injection') CWE