CVE-2026-26030
9.9
CRITICAL · CVSS 3.1 · EPSS 3.8% (pctl 90)
In your normal cycle
Critical by CVSS (9.9), but no sign of active exploitation.
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.
Scoring
| CVSS | 9.9 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| EPSS | 3.78% — more likely to be exploited than 90% of all CVEs |
| Weakness | CWE-94 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2026-02-19 |
| Last modified | 2026-06-17 |
Affected (1)
| Vendor | Product |
|---|---|
| microsoft | semantic kernel |
References
→ the Explorer · watch your stack · NVD