GitHub Advisoryadvisory · PyPI
GHSA-xjw9-4gw8-4rqx Microsoft Semantic Kernel InMemoryVectorStore filter functionality vulnerable to remote code execution
CRITICAL
Official page ↗
- Aliases
- CVE-2026-26030
- Ecosystem
- PyPI
- Packages
- semantic-kernel
- Severity
- Critical
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weaknesses
- CWE-94
- Reviewed
- 2026-02-19
Affected packages
• PyPI semantic-kernel: < 1.39.4 → fixed in 1.39.4
Description
Impact:
An RCE vulnerability has been identified in Microsoft Semantic Kernel Python SDK, specifically within the `InMemoryVectorStore` filter functionality.
Patches:
The problem has been fixed in python-1.39.4. Users should upgrade this version or higher.
Workarounds:
Avoid using `InMemoryVectorStore` for production scenarios.
References:
Release python-1.39.4 · microsoft/semantic-kernel · GitHub
PR to block use of dangerous attribute names that must not be accessed in filter expressions
Related
Alias · CVE (1)
- CVE-2026-26030 Semantic Kernel, Microsoft's semantic kernel Python SDK, has a remote code execution vulnerability in versions prior to 1.39.4,… vulnerability
Weakness · CWE (1)
- CWE-94 Improper Control of Generation of Code weakness
References
- https://github.com/microsoft/semantic-kernel/security/advisories/GHSA-xjw9-4gw8-4rqx web
- https://nvd.nist.gov/vuln/detail/CVE-2026-26030 advisory
- https://github.com/microsoft/semantic-kernel/pull/13505 web
- https://github.com/microsoft/semantic-kernel package
- https://github.com/microsoft/semantic-kernel/releases/tag/python-1.39.4 web
- https://github.com/pypa/advisory-database/tree/main/vulns/semantic-kernel/PYSEC-2026-163.yaml web