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BREW-JUPYTERLAB-CVE-2021-32797 (GHSA-4952-P58Q-6CRX)

Vulnerability from osv_homebrew – Published: 2026-08-13 17:01 – Updated: 2026-09-17 19:02 – Source website
VLAI
Summary
JupyterLab: XSS due to lack of sanitization of the action attribute of an html <form>
Details

Impact

Untrusted notebook can execute code on load. This is a remote code execution, but requires user action to open a notebook.

Patches

Patched in the following versions: 3.1.4, 3.0.17, 2.3.2, 2.2.10, 1.2.21.

References

OWASP Page on Restricting Form Submissions

For more information

If you have any questions or comments about this advisory, or vulnerabilities to report, please email our security list security@ipython.org.

Credit: Guillaume Jeanne from Google

Severity
7.4 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
6.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "upstream_fixed_in": "3.1.4"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "jupyterlab",
        "purl": "pkg:brew/jupyterlab"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.2.0"
            },
            {
              "fixed": "3.1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "registry",
    "upstream_evidence": [
      {
        "ecosystem": "PyPI",
        "key": "pkg:pypi/jupyterlab@4.6.3",
        "name": "jupyterlab",
        "strategy": "registry",
        "subject_version": "4.6.3"
      },
      {
        "ecosystem": "PyPI",
        "key": "pkg:pypi/notebook@7.6.2",
        "name": "notebook",
        "resource": "notebook",
        "strategy": "registry",
        "subject_version": "7.6.2"
      }
    ]
  },
  "details": "### Impact\n\nUntrusted notebook can execute code on load. This is a remote code execution, but requires user action to open a notebook.\n\n### Patches\n\nPatched in the following versions: 3.1.4, 3.0.17, 2.3.2, 2.2.10, 1.2.21.\n\n### References\n\n[OWASP Page on Restricting Form Submissions](https://cheatsheetseries.owasp.org/cheatsheets/Content_Security_Policy_Cheat_Sheet.html)\n\n### For more information\n\nIf you have any questions or comments about this advisory, or vulnerabilities to report, please email our security list security@ipython.org.\n\nCredit: Guillaume Jeanne from Google\n",
  "id": "BREW-jupyterlab-CVE-2021-32797",
  "modified": "2026-09-17T19:02:18Z",
  "published": "2026-08-13T17:01:18Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/google/security-research/security/advisories/GHSA-c469-p3jp-2vhx"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-4952-p58q-6crx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-32797"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jupyterlab/jupyterlab/commit/504825938c0abfa2fb8ff8d529308830a5ae42ed"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/jupyterlab/PYSEC-2021-130.yaml"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "JupyterLab: XSS due to lack of sanitization of the action attribute of an html \u003cform\u003e",
  "upstream": [
    "GHSA-4952-p58q-6crx",
    "BIT-jupyterlab-2021-32797",
    "CVE-2021-32797",
    "PYSEC-2021-130",
    "PYSEC-2026-688"
  ]
}



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