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jupyterlab — security advisory

Type: advisorySources: OSVAdvisory ID: DEBIAN-CVE-2026-67338

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.

Products
jupyterlab
Affected versions
4.0.11+ds1+~cs11.25.27-7, 4.0.11+ds1+~cs11.25.27-8, 4.0.11+ds1+~cs11.25.27-9, 4.0.11+ds2+~cs11.25.27-1, 4.0.11+ds2+~cs11.25.27-3, 4.0.11+ds3+~cs11.25.27-1, 4.0.11+ds4+~cs11.25.27-1, 4.0.11+ds4+~cs11.25.27-2, 4.0.11+ds4+~cs11.25.27-3, 4.0.11+ds4+~cs11.25.27-4, 4.0.11+ds5+~cs11.25.27-1, 4.0.13+ds1+~2.0.1+~cs1.4.4-1, 4.1.3+ds1+~2.0.1+~0.15.3+~cs1.4.4-1, 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-1, 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-2, 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-3, 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-4, 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-5, 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-6, 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-7, 4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-8, 4.4.1+ds1+~3.0.5+~0.16.6+~cs1.4.4-1, 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-1, 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-2, 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-3, 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-4, 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-5, 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-6, 4.4.8+ds1+~3.1.0+~0.16.6+~cs1.4.4-1
Fixed versions
4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-4
CVEs
CVE-2026-67338
Confirmed fixed CVEs
Not specified
Updated in this feed
28 Oct 2026, 11:06 UTC · Revision 1

Source evidence

DEBIAN-CVE-2026-67338

core-osv · Original source

Published 1 Aug 2026, 13:17 UTC

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.

osv:DEBIAN-CVE-2026-67338

jupyterlab

Fixed versions: Not specified

jupyterlab

Fixed versions: 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-4

Complete source record
{
  "id": "6eebfa43955cd50de14590f1d0e3e1178e48e70a53d3461790602e6d6c5b3580",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-67338",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2026-67338",
    "summary": "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.",
    "evidence": "osv:DEBIAN-CVE-2026-67338",
    "products": [
      {
        "name": {
          "value": "jupyterlab",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "4.0.11+ds1+~cs11.25.27-7",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.0.11+ds1+~cs11.25.27-8",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.0.11+ds1+~cs11.25.27-9",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.0.11+ds2+~cs11.25.27-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.0.11+ds2+~cs11.25.27-3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.0.11+ds3+~cs11.25.27-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.0.11+ds4+~cs11.25.27-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.0.11+ds4+~cs11.25.27-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.0.11+ds4+~cs11.25.27-3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.0.11+ds4+~cs11.25.27-4",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.0.11+ds5+~cs11.25.27-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.0.13+ds1+~2.0.1+~cs1.4.4-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.1.3+ds1+~2.0.1+~0.15.3+~cs1.4.4-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-4",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-5",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-6",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-7",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-8",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.4.1+ds1+~3.0.5+~0.16.6+~cs1.4.4-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-4",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-5",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-6",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.4.8+ds1+~3.1.0+~0.16.6+~cs1.4.4-1",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "jupyterlab",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "4.0.11+ds1+~cs11.25.27-7",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.0.11+ds1+~cs11.25.27-8",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.0.11+ds1+~cs11.25.27-9",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.0.11+ds2+~cs11.25.27-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.0.11+ds2+~cs11.25.27-3",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.0.11+ds3+~cs11.25.27-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.0.11+ds4+~cs11.25.27-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.0.11+ds4+~cs11.25.27-2",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.0.11+ds4+~cs11.25.27-3",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.0.11+ds4+~cs11.25.27-4",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.0.11+ds5+~cs11.25.27-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.0.13+ds1+~2.0.1+~cs1.4.4-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.1.3+ds1+~2.0.1+~0.15.3+~cs1.4.4-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-2",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-3",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-4",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-5",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-6",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-7",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-8",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.4.1+ds1+~3.0.5+~0.16.6+~cs1.4.4-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-2",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-3",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.4.8+ds1+~3.1.0+~0.16.6+~cs1.4.4-1",
            "evidence": "/affected/1/versions"
          }
        ]
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "DEBIAN-CVE-2026-67338",
      "aliases": [
        "DEBIAN-CVE-2026-67338"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "jupyterlab",
            "purl": "pkg:deb/debian/jupyterlab?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "versions": [
            "4.0.11+ds1+~cs11.25.27-7",
            "4.0.11+ds1+~cs11.25.27-8",
            "4.0.11+ds1+~cs11.25.27-9",
            "4.0.11+ds2+~cs11.25.27-1",
            "4.0.11+ds2+~cs11.25.27-3",
            "4.0.11+ds3+~cs11.25.27-1",
            "4.0.11+ds4+~cs11.25.27-1",
            "4.0.11+ds4+~cs11.25.27-2",
            "4.0.11+ds4+~cs11.25.27-3",
            "4.0.11+ds4+~cs11.25.27-4",
            "4.0.11+ds5+~cs11.25.27-1",
            "4.0.13+ds1+~2.0.1+~cs1.4.4-1",
            "4.1.3+ds1+~2.0.1+~0.15.3+~cs1.4.4-1",
            "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-1",
            "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-2",
            "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-3",
            "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-4",
            "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-5",
            "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-6",
            "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-7",
            "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-8",
            "4.4.1+ds1+~3.0.5+~0.16.6+~cs1.4.4-1",
            "4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-1",
            "4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-2",
            "4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-3",
            "4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-4",
            "4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-5",
            "4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-6",
            "4.4.8+ds1+~3.1.0+~0.16.6+~cs1.4.4-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-67338.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-4"
                }
              ]
            }
          ],
          "package": {
            "name": "jupyterlab",
            "purl": "pkg:deb/debian/jupyterlab?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "versions": [
            "4.0.11+ds1+~cs11.25.27-7",
            "4.0.11+ds1+~cs11.25.27-8",
            "4.0.11+ds1+~cs11.25.27-9",
            "4.0.11+ds2+~cs11.25.27-1",
            "4.0.11+ds2+~cs11.25.27-3",
            "4.0.11+ds3+~cs11.25.27-1",
            "4.0.11+ds4+~cs11.25.27-1",
            "4.0.11+ds4+~cs11.25.27-2",
            "4.0.11+ds4+~cs11.25.27-3",
            "4.0.11+ds4+~cs11.25.27-4",
            "4.0.11+ds5+~cs11.25.27-1",
            "4.0.13+ds1+~2.0.1+~cs1.4.4-1",
            "4.1.3+ds1+~2.0.1+~0.15.3+~cs1.4.4-1",
            "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-1",
            "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-2",
            "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-3",
            "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-4",
            "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-5",
            "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-6",
            "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-7",
            "4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-8",
            "4.4.1+ds1+~3.0.5+~0.16.6+~cs1.4.4-1",
            "4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-1",
            "4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-2",
            "4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-3",
            "4.4.8+ds1+~3.1.0+~0.16.6+~cs1.4.4-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-67338.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-09T09:47:23.101989245Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-67338"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2026-67338"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-67338",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 111424,
  "published_at": "2026-08-01T13:17:04.843+00:00"
}