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Python CVE-2026-26030

CRITICAL
Code Injection (CWE-94)
2026-02-19 security-advisories@github.com GHSA-xjw9-4gw8-4rqx
9.9
CVSS 3.1 · GitHub Advisory
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Severity by source

GitHub Advisory PRIMARY
9.9 CRITICAL
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 22:03 vuln.today
Patch released
Mar 03, 2026 - 16:32 nvd
Patch available
CVE Published
Feb 19, 2026 - 17:24 nvd
CRITICAL 9.9

DescriptionGitHub Advisory

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.

AnalysisAI

Remote code execution in Microsoft Semantic Kernel Python SDK before 1.39.4. Code injection in the AI orchestration framework. Patch available.

Technical ContextAI

CWE-94 code injection in Microsoft's AI orchestration SDK for building AI agents.

RemediationAI

Update to Semantic Kernel 1.39.4.

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CVE-2026-26030 vulnerability details – vuln.today

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