GHSA-xjw9-4gw8-4rqx
Microsoft Semantic Kernel InMemoryVectorStore filter functionality vulnerable to remote code execution
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| PyPI | semantic-kernel | < 1.39.4 | 1.39.4 |
Details
As written in the advisory (Markdown source, shown as plain text).
### 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](https://github.com/microsoft/semantic-kernel/releases/tag/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](https://github.com/microsoft/semantic-kernel/releases/tag/python-1.39.4)
[PR to block use of dangerous attribute names that must not be accessed in filter expressions](https://github.com/microsoft/semantic-kernel/pull/13505)
References
External links from the advisory. They lead to third-party sites.
- https://github.com/microsoft/semantic-kernel/security/advisories/GHSA-xjw9-4gw8-4rqx
- https://nvd.nist.gov/vuln/detail/CVE-2026-26030
- https://github.com/microsoft/semantic-kernel/pull/13505
- https://github.com/microsoft/semantic-kernel
- https://github.com/microsoft/semantic-kernel/releases/tag/python-1.39.4
- https://github.com/pypa/advisory-database/tree/main/vulns/semantic-kernel/PYSEC-2026-163.yaml