CVE-2026-26030 json
Microsoft Semantic Kernel InMemoryVectorStore filter functionality vulnerable to remote code execution
published 2026-02-19 8 mo ago modified 2026-06-17 4 mo ago also GHSA-xjw9-4gw8-4rqx , PYSEC-2026-163 , EUVD-2026-8014
- cvss
- 10.0
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.9%
- EPSS 3.9% chance of exploitation in 30 days, percentile 90%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- pypi semantic-kernel 1.39.4
- microsoft semantic_kernel 1.39.4
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 8 mo ago
Exploit prediction
3.91% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 10.0 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| GitHub | 3.1 | 9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| OSV | 3.1 | 9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | semantic-kernel | <1.39.4 |
1.39.4 |
Affected products
- microsoft semantic-kernel
Classification
- Weakness
-
- CWE-94 Improper Control of Generation of Code
References
-
github.com
/microsoft/semantic-kernel/pull/13505
web, issue-tracking, patch
-
github.com
/microsoft/semantic-kernel/security/advisories/GHSA-xjw9-4gw8-4rqx
web, patch, vendor-advisory
-
github.com
/microsoft/semantic-kernel/releases/tag/python-1.39.4
web, release-notes, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-26030
advisory
-
github.com
/microsoft/semantic-kernel
package
-
github.com
/pypa/advisory-database/tree/main/vulns/semantic-kernel/PYSEC-2026-163.yaml
web
Sources
- CVE List CVE-2026-26030
- GitHub Advisory GHSA-xjw9-4gw8-4rqx
- NVD CVE-2026-26030
- OSV PYSEC-2026-163
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