CVE-2026-26030 | Semantic Kernel, Microsoft's semantic kernel Python SDK, has… | CVSS 10.0 CRITICAL

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.

Metadata

CVE ID: CVE-2026-26030
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-02-09 21:36 UTC
Published: 2026-02-19 16:00 UTC
Last updated: 2026-02-26 14:44 UTC
Primary CWE: CWE-94
CWE-94: Improper Control of Generation of Code ('Code Inject…
Vendor / Product: microsoft / semantic-kernel
Sources: cve.org · NVD

Severity & Metrics

10.0 CRITICAL CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
microsoft	semantic-kernel	—	< 1.39.4

Weakness (CWE)

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

CVSS scores (1)

Score	Severity	Version	Source	Vector
10.0	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References (3)

https://github.com/microsoft/semantic-kernel/security/advisories/GHSA-xjw9-4gw8-4rqx https://github.com/microsoft/semantic-kernel/security/advisories/GHSA-xjw9-4gw8-4rqx
https://github.com/microsoft/semantic-kernel/pull/13505 https://github.com/microsoft/semantic-kernel/pull/13505
https://github.com/microsoft/semantic-kernel/releases/tag/python-1.39.4 https://github.com/microsoft/semantic-kernel/releases/tag/python-1.39.4