{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "4.5.9"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "dd65403362765017559797d819b2a14a2325bbad"
            }
          ],
          "repo": "https://github.com/jupyterlab/jupyterlab",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-vmhf-c436-hxj4"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-84"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67338.json"
  },
  "details": "JupyterLab before 4.5.9 contains a stored cross-site scripting vulnerability in the Extension Manager that fails to validate URI protocols in package metadata URLs. Attackers can publish malicious PyPI packages with javascript: URLs in project metadata that execute arbitrary JavaScript in the JupyterLab origin when users click the extension name.",
  "id": "CVE-2026-67338",
  "modified": "2026-08-04T11:31:06.726970544Z",
  "published": "2026-08-01T12:22:17.437Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67338.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-vmhf-c436-hxj4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-67338"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/jupyterlab-before-stored-xss-via-extension-manager"
    },
    {
      "type": "FIX",
      "url": "https://github.com/jupyterlab/jupyterlab/commit/4e61e07d0a91145b53fbf96ac74b0387f6bc51f6"
    },
    {
      "type": "FIX",
      "url": "https://github.com/jupyterlab/jupyterlab/commit/d5d961f6e10a6442dddbf94d9a976b3897055a12"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "JupyterLab before 4.5.9 Stored XSS via Extension Manager"
}