{
  "cveId": "CVE-2026-39378",
  "url": "https://patchblox.com/security/cve/CVE-2026-39378",
  "summary": "CVE-2026-39378 is fixed in nbconvert on 1 platform, first by DEBIAN-CVE-2026-39378, released May 15, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "nbconvert: The nbconvert tool, jupyter nbconvert, converts Jupyter notebooks to various other formats via Jinja templates",
  "description": "The nbconvert tool, jupyter nbconvert, converts Jupyter notebooks to various other formats via Jinja templates. In versions 6.5 through 7.17.0, when \u0060HTMLExporter.embed_images=True\u0060, nbconvert\u0027s markdown renderer allows arbitrary file read via path traversal in image references. A malicious notebook can exfiltrate sensitive files from the conversion host by embedding them as base64 data URIs in the output HTML. nbconvert 7.17.1 contains a fix. As a workaround, do not enable \u0060HTMLExporter.embed_images\u0060; it is not enabled by default.",
  "published": "2026-04-21T01:16:06Z",
  "severity": "medium",
  "cvss": 6.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
  "epss": 0.00306,
  "epssPercentile": 0.23586,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "nbconvert",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "7.16.6-1\u002Bdeb13u1",
      "fix": "DEBIAN-CVE-2026-39378",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-39378",
      "released": "2026-05-15T16:01:09Z"
    },
    {
      "platform": "linux",
      "product": "nbconvert",
      "release": "Debian 14",
      "fixedVersion": "7.17.1-1",
      "fix": "DEBIAN-CVE-2026-39378",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-39378",
      "released": "2026-05-15T16:01:09Z"
    }
  ],
  "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"
  }
}