Arbitrary Code Injection Affecting semantic-kernel package, versions [,1.39.4)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published20 Feb 2026
- disclosed19 Feb 2026
- creditamiteliahu, doredry, urioren
Introduced: 19 Feb 2026
CVE-2026-26030 (opens in a new tab)How to fix?
Upgrade semantic-kernel to version 1.39.4 or higher.
Overview
semantic-kernel is a Semantic Kernel Python SDK
Affected versions of this package are vulnerable to Arbitrary Code Injection via the InMemoryVectorStore filter functionality due to lack of filtering for dangerous dunder attributes. An attacker can escape the sandbox and execute arbitrary code by crafting malicious filter expressions.