GHSA-XJW9-4GW8-4RQX
Vulnerability from github – Published: 2026-02-19 19:34 – Updated: 2026-02-19 19:34
VLAI?
Summary
Microsoft Semantic Kernel InMemoryVectorStore filter functionality vulnerable to remote code execution
Details
Impact:
An RCE vulnerability has been identified in Microsoft Semantic Kernel Python SDK, specifically within the InMemoryVectorStore filter functionality.
Patches:
The problem has been fixed in python-1.39.4. Users should upgrade this version or higher.
Workarounds:
Avoid using InMemoryVectorStore for production scenarios.
References:
Release python-1.39.4 · microsoft/semantic-kernel · GitHub PR to block use of dangerous attribute names that must not be accessed in filter expressions
Severity ?
9.9 (Critical)
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "semantic-kernel"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.39.4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-26030"
],
"database_specific": {
"cwe_ids": [
"CWE-94"
],
"github_reviewed": true,
"github_reviewed_at": "2026-02-19T19:34:14Z",
"nvd_published_at": "2026-02-19T17:24:50Z",
"severity": "CRITICAL"
},
"details": "### Impact:\nAn RCE vulnerability has been identified in Microsoft Semantic Kernel Python SDK, specifically within the `InMemoryVectorStore` filter functionality.\n\n### Patches:\nThe problem has been fixed in [python-1.39.4](https://github.com/microsoft/semantic-kernel/releases/tag/python-1.39.4). Users should upgrade this version or higher.\n\n### Workarounds:\nAvoid using `InMemoryVectorStore` for production scenarios.\n\n### References:\n[Release python-1.39.4 \u00b7 microsoft/semantic-kernel \u00b7 GitHub](https://github.com/microsoft/semantic-kernel/releases/tag/python-1.39.4)\n[PR to block use of dangerous attribute names that must not be accessed in filter expressions](https://github.com/microsoft/semantic-kernel/pull/13505)",
"id": "GHSA-xjw9-4gw8-4rqx",
"modified": "2026-02-19T19:34:14Z",
"published": "2026-02-19T19:34:14Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/microsoft/semantic-kernel/security/advisories/GHSA-xjw9-4gw8-4rqx"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-26030"
},
{
"type": "WEB",
"url": "https://github.com/microsoft/semantic-kernel/pull/13505"
},
{
"type": "PACKAGE",
"url": "https://github.com/microsoft/semantic-kernel"
},
{
"type": "WEB",
"url": "https://github.com/microsoft/semantic-kernel/releases/tag/python-1.39.4"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "Microsoft Semantic Kernel InMemoryVectorStore filter functionality vulnerable to remote code execution"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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