Vulnerability intelligence

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. 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 Score

Critical

EPSS — Exploit Probability

0.1%

Riskier than 28% of all CVEs

Exploitation

Not in CISA KEV

No federal exploitation record

Remediation

Patch available

Vendor fix published

NVD entry Vendor patch PoC / advisory

1 article across 1 outlet · first covered May 7, 2026 · latest May 7, 2026

Coverage timeline

When prompts become shells: RCE vulnerabilities in AI agent frameworks
www.microsoft.com · May 7, 2026