CVSS 3.1
9.9 criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HCVE-2026-26030
Critical (9.9) in microsoft semantic kernel. EPSS 3.9% chance of exploitation in the next 30 days. Fixed in semantic-kernel 1.39.4.
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.
Severity
- EPSS
- 3.9% chance of exploitation in the next 30 days; higher than 90% of CVEs (scores of 2026-11-01)
- CWE
- CWE-94
- Published
- Modified
- Record from
- the NVD, synced
Affected
- microsoft:semantic_kernel
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-xjw9-4gw8-4rqx | PyPI | semantic-kernel | <1.39.4 | 1.39.4 |
| PYSEC-2026-163 | PyPI | semantic-kernel | <1.39.4 | 1.39.4 |