Feb 2026: Microsoft Semantic Kernel InMemoryVectorStore filter functionality vulnerable to remote co
CVE-2026-26030 Published on February 19, 2026
Microsoft Semantic Kernel InMemoryVectorStore filter functionality vulnerable to remote code execution
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.
Vulnerability Analysis
CVE-2026-26030 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
What is a Code Injection Vulnerability?
The software constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
CVE-2026-26030 has been classified to as a Code Injection vulnerability or weakness.
Affected Versions
microsoft semantic-kernel Version < 1.39.4 is affected by CVE-2026-26030Vulnerable Packages
The following package name and versions may be associated with CVE-2026-26030
| Package Manager | Vulnerable Package | Versions | Fixed In |
|---|---|---|---|
| pip | semantic-kernel | < 1.39.4 | 1.39.4 |
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.