UnratedFix available

DEBIAN-CVE-2026-73416

Type: advisorySource: OSV1 source record

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From 4.5.0 until 4.5.10 and 4.6.2, in jupyterlab/extensions/manager.py and jupyterlab/extensions/pypi.py, JupyterLab's PyPI extension manager enforces blocked_extensions_uris by comparing requested install names to blocklist entries with custom normalization that is weaker than PyPI package-name canonicalization. An authenticated user can request a PyPI-equivalent spelling such as JupyterLab.Git for a blocklisted package such as jupyterlab-git, and JupyterLab accepts the install request even though pip resolves the variant to the same package. Security impact requires an allowlist or blocklist intended to restrict package installation, the PyPI Extension Manager, and kernels and terminals that are disabled or delegated to remote hosts. The bypass lets an authenticated user install a prohibited extension, defeat integrity restrictions, and affect availability without gaining new read access. This issue is fixed in versions 4.5.10 and 4.6.2.

Announced 13 Aug 2026Source revision 1

Original source ↗

DEBIAN-CVE-2026-73416

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-73416

jupyterlab

Source reference: /affected/0/package/name

Affected versions: 4.0.11+ds1+~cs11.25.27-7
Source reference: /affected/0/versions
4.0.11+ds1+~cs11.25.27-8
Source reference: /affected/0/versions
4.0.11+ds1+~cs11.25.27-9
Source reference: /affected/0/versions
4.0.11+ds2+~cs11.25.27-1
Source reference: /affected/0/versions
4.0.11+ds2+~cs11.25.27-3
Source reference: /affected/0/versions
4.0.11+ds3+~cs11.25.27-1
Source reference: /affected/0/versions
4.0.11+ds4+~cs11.25.27-1
Source reference: /affected/0/versions
4.0.11+ds4+~cs11.25.27-2
Source reference: /affected/0/versions
4.0.11+ds4+~cs11.25.27-3
Source reference: /affected/0/versions
4.0.11+ds4+~cs11.25.27-4
Source reference: /affected/0/versions
4.0.11+ds5+~cs11.25.27-1
Source reference: /affected/0/versions
4.0.13+ds1+~2.0.1+~cs1.4.4-1
Source reference: /affected/0/versions
4.1.3+ds1+~2.0.1+~0.15.3+~cs1.4.4-1
Source reference: /affected/0/versions
4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-1
Source reference: /affected/0/versions
4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-2
Source reference: /affected/0/versions
4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-3
Source reference: /affected/0/versions
4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-4
Source reference: /affected/0/versions
4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-5
Source reference: /affected/0/versions
4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-6
Source reference: /affected/0/versions
4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-7
Source reference: /affected/0/versions
4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-8
Source reference: /affected/0/versions
4.4.1+ds1+~3.0.5+~0.16.6+~cs1.4.4-1
Source reference: /affected/0/versions
4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-1
Source reference: /affected/0/versions
4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-2
Source reference: /affected/0/versions
4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-3
Source reference: /affected/0/versions
4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-4
Source reference: /affected/0/versions
4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-5
Source reference: /affected/0/versions
4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-6
Source reference: /affected/0/versions
4.4.8+ds1+~3.1.0+~0.16.6+~cs1.4.4-1
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

jupyterlab

Source reference: /affected/1/package/name

Affected versions: 4.0.11+ds1+~cs11.25.27-7
Source reference: /affected/1/versions
4.0.11+ds1+~cs11.25.27-8
Source reference: /affected/1/versions
4.0.11+ds1+~cs11.25.27-9
Source reference: /affected/1/versions
4.0.11+ds2+~cs11.25.27-1
Source reference: /affected/1/versions
4.0.11+ds2+~cs11.25.27-3
Source reference: /affected/1/versions
4.0.11+ds3+~cs11.25.27-1
Source reference: /affected/1/versions
4.0.11+ds4+~cs11.25.27-1
Source reference: /affected/1/versions
4.0.11+ds4+~cs11.25.27-2
Source reference: /affected/1/versions
4.0.11+ds4+~cs11.25.27-3
Source reference: /affected/1/versions
4.0.11+ds4+~cs11.25.27-4
Source reference: /affected/1/versions
4.0.11+ds5+~cs11.25.27-1
Source reference: /affected/1/versions
4.0.13+ds1+~2.0.1+~cs1.4.4-1
Source reference: /affected/1/versions
4.1.3+ds1+~2.0.1+~0.15.3+~cs1.4.4-1
Source reference: /affected/1/versions
4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-1
Source reference: /affected/1/versions
4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-2
Source reference: /affected/1/versions
4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-3
Source reference: /affected/1/versions
4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-4
Source reference: /affected/1/versions
4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-5
Source reference: /affected/1/versions
4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-6
Source reference: /affected/1/versions
4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-7
Source reference: /affected/1/versions
4.1.8+ds1+~2.0.1+~0.15.3+~cs1.4.4-8
Source reference: /affected/1/versions
4.4.1+ds1+~3.0.5+~0.16.6+~cs1.4.4-1
Source reference: /affected/1/versions
4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-1
Source reference: /affected/1/versions
4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-2
Source reference: /affected/1/versions
4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-3
Source reference: /affected/1/versions
4.4.8+ds1+~3.1.0+~0.16.6+~cs1.4.4-1
Source reference: /affected/1/versions
Fixed versions: 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-4
Source reference: /affected/1/ranges
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "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-2026-73416.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-2026-73416.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #56317 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 16:33:32 GMT
Publisher date: Thu, 13 Aug 2026 22:17:25 GMT

Read the original announcement