CRITICAL9.9

PYSEC-2026-163

Quick fix

PYSEC-2026-163 — semantic-kernel: upgrade to the fixed version with the command below.

pip install --upgrade 'semantic-kernel>=1.39.4'

Details

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.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/semantic-kernel

Introduced in: 0Fixed in: 1.39.4

Fixpip install --upgrade 'semantic-kernel>=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]