PYSEC-2026-163

At a glance

Published: 2026-02-19 17:24 UTC
Updated: 2026-05-24 16:45 UTC
CVE: CVE-2026-26030
Aliases: GHSA-xjw9-4gw8-4rqx
CVSS_V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

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.

Affected packages

Package	Versions
PyPI · semantic-kernel	introduced 0, fixed 1.39.4

References

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

Sources

Source	Licence
OSV.dev	CC-BY 4.0 — PyPA Advisory Database