PYSEC-2026-688

Vulnerability from pysec - Published: 2026-07-02 14:13 - Updated: 2026-07-06 07:36
VLAI
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
Impacted products
Name purl
notebook pkg:pypi/notebook
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "notebook",
        "purl": "pkg:pypi/notebook"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.7.11"
            },
            {
              "introduced": "6.0.0"
            },
            {
              "fixed": "6.4.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.0.0",
        "4.0.0",
        "4.0.1",
        "4.0.2",
        "4.0.4",
        "4.0.5",
        "4.0.6",
        "4.1.0",
        "4.2.0",
        "4.2.0b1",
        "4.2.1",
        "4.2.2",
        "4.2.3",
        "4.3.0",
        "4.3.1",
        "4.3.2",
        "4.4.0",
        "4.4.1",
        "5.0.0",
        "5.0.0b1",
        "5.0.0b2",
        "5.0.0rc1",
        "5.0.0rc2",
        "5.1.0",
        "5.1.0rc1",
        "5.1.0rc2",
        "5.1.0rc3",
        "5.2.0",
        "5.2.0rc1",
        "5.2.1",
        "5.2.1rc1",
        "5.2.2",
        "5.3.0",
        "5.3.0rc1",
        "5.3.1",
        "5.4.0",
        "5.4.1",
        "5.5.0",
        "5.5.0rc1",
        "5.6.0",
        "5.6.0rc1",
        "5.7.0",
        "5.7.1",
        "5.7.10",
        "5.7.2",
        "5.7.3",
        "5.7.4",
        "5.7.5",
        "5.7.6",
        "5.7.8",
        "5.7.9",
        "6.0.0",
        "6.0.1",
        "6.0.2",
        "6.0.3",
        "6.1.0",
        "6.1.0rc1",
        "6.1.1",
        "6.1.2",
        "6.1.3",
        "6.1.4",
        "6.1.5",
        "6.1.6",
        "6.2.0",
        "6.3.0",
        "6.4.0",
        "6.4.0a0",
        "6.4.0a1",
        "6.4.0rc0"
      ]
    }
  ],
  "aliases": [
    "CVE-2021-32797",
    "GHSA-4952-p58q-6crx"
  ],
  "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": "PYSEC-2026-688",
  "modified": "2026-07-06T07:36:57.662780Z",
  "published": "2026-07-02T14:13:10.480332Z",
  "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"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/notebook"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-4952-p58q-6crx"
    }
  ],
  "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"
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.