CVE-2026-26030 is a critical remote code execution (RCE) vulnerability affecting Microsoft's Semantic Kernel Python SDK versions prior to 1.39.4, specifically within the InMemoryVectorStore filter functionality. With a CVSS score of 9.9, this vulnerability allows an authenticated attacker to execute arbitrary code remotely with low attack complexity, leading to high impacts on confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion, indicating high awareness. Users are strongly advised to upgrade to version 1.39.4 or higher, or as a workaround, avoid using InMemoryVectorStore in production environments.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.39.4CPE matchmatch criteria | cpe:2.3:a:microsoft:semantic_kernel:*:*:*:*:*:python:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 1.0 Bluesky, 0.5 Mastodon, and 1.6 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.