{"id":"CVE-2026-26030","aliases":["EUVD-2026-8014","GHSA-xjw9-4gw8-4rqx","PYSEC-2026-163"],"status":"published","title":"Microsoft Semantic Kernel InMemoryVectorStore filter functionality vulnerable to remote code execution","description":"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.","severity":{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.03914,"percentile":0.90442,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-94"],"published":"2026-02-19T16:00:55Z","modified":"2026-10-28T02:31:05Z","exploits":[{"source":"pocgithub","id":"InertFluid/sk-cve-2026-26030-lab","title":"InertFluid/sk-cve-2026-26030-lab","date":"2026-06-22","url":"https://github.com/InertFluid/sk-cve-2026-26030-lab"},{"source":"pocgithub","id":"mbanyamer/CVE-2026-26030-Microsoft-Semantic-Kernel-1.39.4-RCE","title":"mbanyamer/CVE-2026-26030-Microsoft-Semantic-Kernel-1.39.4-RCE","date":"2026-02-24","url":"https://github.com/mbanyamer/CVE-2026-26030-Microsoft-Semantic-Kernel-1.39.4-RCE"}],"fixes":[{"ecosystem":"PyPI","package":"semantic-kernel","fixed_in":["1.39.4"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"semantic-kernel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.39.4"}]}]},{"source":"osv","ecosystem":"PyPI","package":"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"]},{"source":"osv","ecosystem":"PyPI","package":"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"]}],"products":[{"vendor":"microsoft","product":"semantic-kernel"},{"vendor":"microsoft","product":"semantic_kernel"}],"references":[{"url":"https://github.com/microsoft/semantic-kernel/security/advisories/GHSA-xjw9-4gw8-4rqx","tags":["x_refsource_CONFIRM","Patch","Vendor Advisory","advisory","web","fix"]},{"url":"https://github.com/microsoft/semantic-kernel/pull/13505","tags":["x_refsource_MISC","Issue Tracking","Patch","fix","web"]},{"url":"https://github.com/microsoft/semantic-kernel/releases/tag/python-1.39.4","tags":["x_refsource_MISC","Release Notes","web","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26030","tags":["advisory"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/semantic-kernel/PYSEC-2026-163.yaml","tags":["web"]},{"url":"https://github.com/advisories/GHSA-xjw9-4gw8-4rqx"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26030.json","tags":["advisory"]},{"url":"https://github.com/microsoft/semantic-kernel","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-26030","title":"Microsoft Semantic Kernel InMemoryVectorStore filter functionality vulnerable to remote code execution","description":"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.","status":"published","published":"2026-02-19T16:00:55.623Z","modified":"2026-02-26T14:44:14.276Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T13:38:20.971157Z"}],"euvd":[{"id":"EUVD-2026-8014","description":"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.","status":"published","published":"2026-02-19T16:00:55Z","modified":"2026-02-26T14:44:14Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T19:48:27.477434Z"}],"ghsa":[{"id":"GHSA-xjw9-4gw8-4rqx","title":"Microsoft Semantic Kernel InMemoryVectorStore filter functionality vulnerable to remote code execution","description":"### 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)","status":"published","published":"2026-02-19T19:34:14Z","modified":"2026-06-08T23:19:40Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T14:40:20.187636Z"}],"nvd":[{"id":"CVE-2026-26030","description":"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.","status":"published","published":"2026-02-19T17:24:50.487Z","modified":"2026-06-17T10:25:37.857Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T14:12:06.274729Z"}],"osv":[{"id":"CVE-2026-26030","title":"Microsoft Semantic Kernel InMemoryVectorStore filter functionality vulnerable to remote code execution","description":"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.","status":"published","published":"2026-02-19T16:00:55.623Z","modified":"2026-10-28T02:31:05.381690128Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T15:44:59.80315Z"},{"id":"GHSA-xjw9-4gw8-4rqx","title":"Microsoft Semantic Kernel InMemoryVectorStore filter functionality vulnerable to remote code execution","description":"### 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)","status":"published","published":"2026-02-19T19:34:14Z","modified":"2026-06-08T23:30:20.861750576Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T15:47:00.198893Z"},{"id":"PYSEC-2026-163","description":"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.","status":"published","published":"2026-02-19T17:24:50.487Z","modified":"2026-05-24T16:45:05.183432288Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:52:55.06457Z"}]}}