{"id":"GHSA-xjw9-4gw8-4rqx","summary":"Microsoft Semantic Kernel InMemoryVectorStore filter functionality vulnerable to remote code execution","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 · microsoft/semantic-kernel · 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)","aliases":["CVE-2026-26030","PYSEC-2026-163"],"modified":"2026-06-08T23:30:20.861750576Z","published":"2026-02-19T19:34:14Z","database_specific":{"cwe_ids":["CWE-94"],"severity":"CRITICAL","github_reviewed":true,"github_reviewed_at":"2026-02-19T19:34:14Z","nvd_published_at":"2026-02-19T17:24:50Z"},"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"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/semantic-kernel/PYSEC-2026-163.yaml"}],"affected":[{"package":{"name":"semantic-kernel","ecosystem":"PyPI","purl":"pkg:pypi/semantic-kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.39.4"}]}],"versions":["0.0.1.dev0","0.1.0.dev0","0.2.0.dev0","0.2.1.dev0","0.2.2.dev0","0.2.3.dev0","0.2.4.dev0","0.2.5.dev0","0.2.6.dev0","0.2.7.dev0","0.2.8.dev0","0.2.9.dev0","0.3.0.dev0","0.3.1.dev0","0.3.10.dev0","0.3.11.dev0","0.3.12.dev0","0.3.13.dev0","0.3.14.dev0","0.3.15.dev0","0.3.2.dev0","0.3.3.dev0","0.3.4.dev0","0.3.5.dev0","0.3.6.dev0","0.3.7.dev0","0.3.8.dev0","0.3.9.dev0","0.4.0.dev0","0.4.1.dev0","0.4.2.dev0","0.4.3.dev0","0.4.4.dev0","0.4.5.dev0","0.4.6.dev0","0.4.7.dev0","0.5.0.dev0","0.5.1.dev0","0.9.0b1","0.9.1b1","0.9.2b1","0.9.3b1","0.9.4b1","0.9.5b1","0.9.6b1","0.9.7b1","0.9.8b1","0.9.9b1","1.0.0","1.0.0rc1","1.0.1","1.0.2","1.0.3","1.0.4","1.0.5","1.1.0","1.1.1","1.1.2","1.10.0","1.10.1","1.11.0","1.12.0","1.12.1","1.13.0","1.14.0","1.15.0","1.16.0","1.17.0","1.17.1","1.18.0","1.18.1","1.18.2","1.19.0","1.2.0","1.20.0","1.21.0","1.21.1","1.21.2","1.21.3","1.22.0","1.22.1","1.23.0","1.23.1","1.24.0","1.24.1","1.25.0","1.26.0","1.26.1","1.27.0","1.27.1","1.27.2","1.28.0","1.28.1","1.29.0","1.3.0","1.30.0","1.31.0","1.32.0","1.32.1","1.32.2","1.33.0","1.34.0","1.35.0","1.35.1","1.35.2","1.35.3","1.36.0","1.36.1","1.36.2","1.37.0","1.37.1","1.38.0","1.39.0","1.39.1","1.39.2","1.39.3","1.4.0","1.5.0","1.5.1","1.6.0","1.7.0","1.8.0","1.8.1","1.8.2","1.8.3","1.9.0"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-xjw9-4gw8-4rqx/GHSA-xjw9-4gw8-4rqx.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"}]}