CVE-2026-26030
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.71%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 9.9 CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 3.71% probability · 89th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-94
- Affected
- microsoft/semantic kernel
- Source
- security-advisories@github.com
References
- https://github.com/microsoft/semantic-kernel/pull/13505Issue Tracking, Patch
- https://github.com/microsoft/semantic-kernel/releases/tag/python-1.39.4Release Notes
- https://github.com/microsoft/semantic-kernel/security/advisories/GHSA-xjw9-4gw8-4rqxPatch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.