Remote Code Execution Vulnerability in Microsoft's Python SDK for Semantic Kernel
CVE-2026-26030
Key Information:
- Vendor
Microsoft
- Status
- Vendor
- CVE Published:
- 19 February 2026
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What is CVE-2026-26030?
The Semantic Kernel Python SDK from Microsoft contains a flaw within the InMemoryVectorStore filter functionality that may allow an attacker to execute arbitrary code remotely. This vulnerability impacts versions of the SDK released prior to 1.39.4. Users are strongly advised to upgrade to version 1.39.4 or later to mitigate this risk. As an alternative measure, it is recommended to avoid utilizing the InMemoryVectorStore in production environments until the upgrade is applied. For more detailed information, please refer to the relevant security advisories and release notes.
Affected Version(s)
semantic-kernel < 1.39.4
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.