{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@joplin/onenote-converter"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.5.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-22810"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-24"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-15T16:27:11Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Summary\nA path traversal vulnerability in the OneNote importer allows overwriting arbitrary files on disk.\n\n### Details\nThe OneNote converter does not sanitize the names of embedded files before writing them to disk. As a result, it\u0027s possible for an attacker to create a malicious `.one` file that includes file names containing `../../`, that are then interpreted as part of the target path when extracting attachments from the `.one` file.\n\nOne affected location is `embedded_file.rs`, which generates a file name from a string previously parsed from the `.one` file,\nhttps://github.com/laurent22/joplin/blob/af5108d70233b1db9410346958c1587cf7c1b16d/packages/onenote-converter/renderer/src/page/embedded_file.rs#L13-L16\n\nAbove, [`determine_filename`](https://github.com/laurent22/joplin/blob/af5108d70233b1db9410346958c1587cf7c1b16d/packages/onenote-converter/renderer/src/page/embedded_file.rs#L56-L64) passes through the provided file name.\n\n[Similar logic](https://github.com/laurent22/joplin/blob/4d7fa5972fe2986eae14cbf3a2801835cbe1384e/packages/onenote-converter/src/page/embedded_file.rs#L14) has been present since 4d7fa5972fe2986eae14cbf3a2801835cbe1384e (Joplin 3.2.2), when the OneNote importer was first introduced.\n\n### PoC\n\n[Screencast from 2025-11-20 13-50-21.webm](https://github.com/user-attachments/assets/a9d6cc64-ec11-4f33-9f92-32efe0eaab23)\n\n\n1. Import [poc_v2.zip](https://github.com/user-attachments/files/23664109/poc_v2.zip).\n2. Open the application\u0027s profile directory, then open `log.txt`.\n3. Observe that `log.txt` has been overwritten non-log-file content (a WAV file).\n\nTested on Fedora Linux 43 with Joplin 3.4.12 (prod, linux) and Joplin 3.5.6 (dev, linux).\n\n**Note**: The PoC ZIP file overwrites Joplin\u0027s `log.txt`. It is also possible to craft a file that overwrites more sensitive system files (e.g. `.bashrc` on Linux).\n\n### Impact\nThis is a path traversal vulnerability that impacts **all versions of Joplin (\u003c= v3.5.6) that include a OneNote importer**. Importing a crafted OneNote export file allows an attacker to overwrite arbitrary files, potentially leading to remote code execution.\n\n### Patched in\n\n- **Joplin**: https://github.com/laurent22/joplin/commit/791668455e1aae50501ff57ea4783b3fba9d377c\n- **one2html**: https://github.com/msiemens/one2html/commit/948d65cdca5bb35d776b8b235ec05ff15249fd41",
  "id": "GHSA-gcmj-c9gg-9vh6",
  "modified": "2026-05-15T16:27:11Z",
  "published": "2026-05-15T16:27:11Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/laurent22/joplin/security/advisories/GHSA-gcmj-c9gg-9vh6"
    },
    {
      "type": "WEB",
      "url": "https://github.com/laurent22/joplin/pull/13736"
    },
    {
      "type": "WEB",
      "url": "https://github.com/laurent22/joplin/commit/791668455e1aae50501ff57ea4783b3fba9d377c"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/laurent22/joplin"
    },
    {
      "type": "WEB",
      "url": "https://github.com/laurent22/joplin/blob/af5108d70233b1db9410346958c1587cf7c1b16d/packages/onenote-converter/renderer/src/page/embedded_file.rs#L13-L16"
    },
    {
      "type": "WEB",
      "url": "https://github.com/laurent22/joplin/releases/tag/v3.5.7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "@joplin/onenote-converter: Path traversal in OneNote importer allows overwriting arbitrary files"
}