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CVE

CVE-2026-26030

Microsoft Semantic Kernel InMemoryVectorStore filter functionality vulnerable to remote code execution
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CVE

CVE-2026-26030

Microsoft Semantic Kernel InMemoryVectorStore filter functionality vulnerable to remote code execution

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

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.9
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
C
H
U
10
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Related Resources

No items found.

References

https://github.com/microsoft/semantic-kernel/security/advisories/GHSA-xjw9-4gw8-4rqx, https://nvd.nist.gov/vuln/detail/CVE-2026-26030, https://github.com/microsoft/semantic-kernel/pull/13505, https://github.com/microsoft/semantic-kernel, https://github.com/microsoft/semantic-kernel/releases/tag/python-1.39.4

Severity

9.9

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
9.9
EPSS Probability
0.00089%
EPSS Percentile
0.25339%
Introduced Version
0,1.34.0
Fix Available
1.39.4

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