CVE-2026-26030
Microsoft Semantic Kernel InMemoryVectorStore filter functionality vulnerable to remote code execution
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.
INFO
Published Date :
Feb. 19, 2026, 5:24 p.m.
Last Modified :
March 3, 2026, 4:32 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Upgrade Semantic Kernel to version 1.39.4 or higher.
- Avoid using InMemoryVectorStore in production.
Public PoC/Exploit Available at Github
CVE-2026-26030 has a 12 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-26030.
| URL | Resource |
|---|---|
| https://github.com/microsoft/semantic-kernel/pull/13505 | Issue Tracking Patch |
| 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 | Patch Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-26030 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-26030
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-26030 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-26030 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 03, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:microsoft:semantic_kernel:*:*:*:*:*:python:*:* versions up to (excluding) 1.39.4 Added Reference Type GitHub, Inc.: https://github.com/microsoft/semantic-kernel/pull/13505 Types: Issue Tracking, Patch Added Reference Type GitHub, Inc.: https://github.com/microsoft/semantic-kernel/releases/tag/python-1.39.4 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/microsoft/semantic-kernel/security/advisories/GHSA-xjw9-4gw8-4rqx Types: Patch, Vendor Advisory -
New CVE Received by [email protected]
Feb. 19, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Added CWE CWE-94 Added Reference https://github.com/microsoft/semantic-kernel/pull/13505 Added Reference https://github.com/microsoft/semantic-kernel/releases/tag/python-1.39.4 Added Reference https://github.com/microsoft/semantic-kernel/security/advisories/GHSA-xjw9-4gw8-4rqx