{
  "cveId": "CVE-2026-73626",
  "url": "https://patchblox.com/security/cve/CVE-2026-73626",
  "summary": "CVE-2026-73626 is fixed in jupyterlab on 1 platform by DEBIAN-CVE-2026-73626 (version 4.4.10\u002Bds1\u002B~3.1.0\u002B~0.16.6\u002B~cs1.4.4-4), released August 25, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "jupyterlab: JupyterLab versions \u003E=4.6.0,\u003C=4.6.1 and \u003C=4.5.9 contain an allowlist/blocklist enforcement gap in PyPIExtensionManage...",
  "description": "JupyterLab versions \u003E=4.6.0,\u003C=4.6.1 and \u003C=4.5.9 contain an allowlist/blocklist enforcement gap in PyPIExtensionManager.install(). A missing \u0027await\u0027 caused the is_install_allowed coroutine to never execute, so the extension allowlist/blocklist check was not enforced for direct callers of install(). The stock JupyterLab HTTP API and Extension Manager UI are not affected, as they perform a separate, correctly awaited check. The issue affects only deployments where a custom extension or downstream integration imports PyPIExtensionManager and calls install() directly with a package name influenced by untrusted input, an allowlist/blocklist is configured, the PyPI Extension Manager is enabled, and kernels and terminals are disabled or delegated to remote hosts. Fixed in JupyterLab 4.6.2 and 4.5.10.",
  "published": "2026-08-13T12:17:27Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00363,
  "epssPercentile": 0.30302,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "jupyterlab",
      "release": "Debian 14",
      "fixedVersion": "4.4.10\u002Bds1\u002B~3.1.0\u002B~0.16.6\u002B~cs1.4.4-4",
      "fix": "DEBIAN-CVE-2026-73626",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-73626",
      "released": "2026-08-25T00:08:54Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}