CVE-2026-42557
CVE-2026-42557 · jupyterlab: Command linker attributes in HTML enable one-click command execution from untrusted content
This page contains facts from public vulnerability sources. Check the original advisory before updating.
This page shows selected source facts. See the linked advisories for the complete description and affected versions.
jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. Prior to 4.5.7, JupyterLab's HTML sanitizer allowlists data-commandlinker-command and data-commandlinker-args on button elements, while CommandLinker listens for all click events on document.body and executes the named command without checking whether the element came from trusted JupyterLab UI. A notebook with a pre-saved HTML cell output containing a deceptive button can trigger arbitrary JupyterLab commands - including arbitrary code execution - on a single user click, without any code being submitted for execution by the user. This vulnerability is fixed in 4.5.7.
CVSS 8.6 · High · EPSS 0.4% · Fix available
- Published
- Updated
Affected products and versions
jupyterlab
- Versions
- < 4.5.7: Affected
No fix published
notebook
- Versions
- >= 7.0.0, < 7.5.6: Affected
No fix published
jupyterlab 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
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
jupyterlab 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
- 4.4.8+ds1+~3.1.0+~0.16.6+~cs1.4.4-1
- Affected ranges
- ECOSYSTEM: < 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-3
Update to 4.4.10+ds1+~3.1.0+~0.16.6+~cs1.4.4-3
jupyterlab PyPI
- Versions
- 0.0.1
- 0.0.10
- 0.0.13
- 0.0.2
- 0.0.3
- 0.0.4
- 0.0.5
- 0.0.6
- 0.0.7
- 0.0.8
- 0.0.9
- 0.1.1
- 0.1.2
- 0.10.0
- 0.11.0
- 0.11.1
- 0.11.2
- 0.11.3
- 0.12.0
- 0.12.1
- 0.13.0
- 0.13.1
- 0.13.2
- 0.14.0
- 0.15.0
- 0.15.1
- 0.16.0
- 0.16.2
- 0.17.0
- 0.17.1
- 0.17.2
- 0.17.4
- 0.17.5
- 0.18.0
- 0.18.0.dev1
- 0.18.1
- 0.19.0
- 0.2.0
- 0.20.0
- 0.20.0rc1
- 0.20.1
- 0.20.2
- 0.20.3
- 0.20.4
- 0.21.0
- 0.21.0rc1
- 0.21.0rc2
- 0.21.0rc3
- 0.21.0rc4
- 0.21.0rc5
- 0.22.0
- 0.22.0rc0
- 0.22.1
- 0.23.0
- 0.23.0rc0
- 0.23.0rc1
- 0.23.1
- 0.23.2
- 0.24.0
- 0.24.0rc0
- 0.24.0rc1
- 0.24.0rc2
- 0.24.1
- 0.25.0
- 0.25.0rc0
- 0.25.0rc1
- 0.25.1
- 0.25.2
- 0.25.2rc0
- 0.26.0
- 0.26.0rc0
- 0.26.0rc1
- 0.26.1
- 0.26.2
- 0.26.3
- 0.26.4
- 0.26.5
- 0.27.0
- 0.27.0rc0
- 0.27.0rc1
- 0.27.0rc2
- 0.27.0rc3
- 0.27.0rc4
- 0.27.0rc5
- 0.27.1
- 0.27.2
- 0.28.0
- 0.28.0rc0
- 0.28.0rc1
- 0.28.0rc2
- 0.28.0rc3
- 0.28.1
- 0.28.10
- 0.28.11
- 0.28.12
- 0.28.13
- 0.28.14
- 0.28.15
- 0.28.2
- 0.28.3
- 0.28.4
- 0.28.5
- 0.28.6
- 0.28.7
- 0.28.8
- 0.29.0
- 0.29.0rc0
- 0.29.1
- 0.29.2
- 0.3.0
- 0.30.0
- 0.30.0rc0
- 0.30.0rc1
- 0.30.1
- 0.30.2
- 0.30.3
- 0.30.4
- 0.30.5
- 0.30.6
- 0.31.0
- 0.31.0rc0
- 0.31.0rc1
- 0.31.0rc2
- 0.31.1
- 0.31.10
- 0.31.11
- 0.31.12
- 0.31.2
- 0.31.3
- 0.31.4
- 0.31.5
- 0.31.6
- 0.31.7
- 0.31.8
- 0.31.9
- 0.32.0
- 0.32.0rc0
- 0.32.0rc1
- 0.32.1
- 0.33.0
- 0.33.0rc0
- 0.33.0rc1
- 0.33.1
- 0.33.10
- 0.33.11
- 0.33.12
- 0.33.2
- 0.33.3
- 0.33.4
- 0.33.5
- 0.33.6
- 0.33.7
- 0.33.8
- 0.33.9
- 0.34.0
- 0.34.0rc0
- 0.34.0rc1
- 0.34.0rc2
- 0.34.1
- 0.34.10
- 0.34.11
- 0.34.12
- 0.34.2
- 0.34.3
- 0.34.4
- 0.34.5
- 0.34.6
- 0.34.7
- 0.34.8
- 0.34.9
- 0.35.0
- 0.35.0rc0
- 0.35.0rc1
- 0.35.0rc2
- 0.35.1
- 0.35.2
- 0.35.3
- 0.35.4
- 0.35.5
- 0.35.6
- 0.4.0
- 0.4.1
- 0.5.0
- 0.6.0
- 0.7.0
- 0.8.0
- 0.9.0
- 0.9.1
- 1.0.0
- 1.0.0a0
- 1.0.0a1
- 1.0.0a10
- 1.0.0a2
- 1.0.0a3
- 1.0.0a4
- 1.0.0a5
- 1.0.0a6
- 1.0.0a7
- 1.0.0a8
- 1.0.0a9
- 1.0.0rc0
- 1.0.0rc1
- 1.0.1
- 1.0.10
- 1.0.2
- 1.0.3
- 1.0.4
- 1.0.5
- 1.0.6
- 1.0.7
- 1.0.9
- 1.1.0
- 1.1.0a0
- 1.1.0a1
- 1.1.0a2
- 1.1.0rc0
- 1.1.1
- 1.1.2
- 1.1.3
- 1.1.4
- 1.1.5
- 1.2.0
- 1.2.0a0
- 1.2.0a1
- 1.2.0a2
- 1.2.0a3
- 1.2.0rc0
- 1.2.1
- 1.2.10
- 1.2.11
- 1.2.12
- 1.2.13
- 1.2.14
- 1.2.15
- 1.2.16
- 1.2.17
- 1.2.18
- 1.2.19
- 1.2.2
- 1.2.20
- 1.2.21
- 1.2.3
- 1.2.4
- 1.2.5
- 1.2.6
- 1.2.7
- 1.2.8
- 1.2.9
- 2.0.0
- 2.0.0a0
- 2.0.0a1
- 2.0.0a3
- 2.0.0a4
- 2.0.0b1
- 2.0.0b2
- 2.0.0b3
- 2.0.0rc0
- 2.0.0rc1
- 2.0.0rc2
- 2.0.1
- 2.0.1rc0
- 2.0.2
- 2.1.0
- 2.1.0a0
- 2.1.0b0
- 2.1.0rc0
- 2.1.1
- 2.1.2
- 2.1.3
- 2.1.4
- 2.1.5
- 2.2.0
- 2.2.0a0
- 2.2.0a1
- 2.2.0rc1
- 2.2.1
- 2.2.10
- 2.2.2
- 2.2.4
- 2.2.5
- 2.2.6
- 2.2.7
- 2.2.8
- 2.2.9
- 2.3.0
- 2.3.0a0
- 2.3.0a1
- 2.3.0a2
- 2.3.0rc0
- 2.3.1
- 2.3.2
- 3.0.0
- 3.0.0a0
- 3.0.0a10
- 3.0.0a11
- 3.0.0a12
- 3.0.0a13
- 3.0.0a14
- 3.0.0a3
- 3.0.0a4
- 3.0.0a5
- 3.0.0a6
- 3.0.0a7
- 3.0.0a8
- 3.0.0a9
- 3.0.0b1
- 3.0.0b2
- 3.0.0b3
- 3.0.0b4
- 3.0.0b6
- 3.0.0b7
- 3.0.0b8
- 3.0.0rc0
- 3.0.0rc1
- 3.0.0rc10
- 3.0.0rc11
- 3.0.0rc12
- 3.0.0rc13
- 3.0.0rc14
- 3.0.0rc15
- 3.0.0rc2
- 3.0.0rc3
- 3.0.0rc4
- 3.0.0rc5
- 3.0.0rc6
- 3.0.0rc7
- 3.0.0rc8
- 3.0.0rc9
- 3.0.1
- 3.0.10
- 3.0.11
- 3.0.12
- 3.0.13
- 3.0.14
- 3.0.15
- 3.0.16
- 3.0.17
- 3.0.18
- 3.0.2
- 3.0.3
- 3.0.4
- 3.0.5
- 3.0.6
- 3.0.7
- 3.0.8
- 3.0.9
- 3.1.0
- 3.1.0a0
- 3.1.0a1
- 3.1.0a10
- 3.1.0a11
- 3.1.0a12
- 3.1.0a13
- 3.1.0a2
- 3.1.0a3
- 3.1.0a4
- 3.1.0a5
- 3.1.0a6
- 3.1.0a7
- 3.1.0a8
- 3.1.0a9
- 3.1.0b0
- 3.1.0b1
- 3.1.0rc1
- 3.1.0rc2
- 3.1.1
- 3.1.10
- 3.1.11
- 3.1.12
- 3.1.13
- 3.1.14
- 3.1.16
- 3.1.17
- 3.1.18
- 3.1.19
- 3.1.2
- 3.1.4
- 3.1.6
- 3.1.7
- 3.1.8
- 3.1.9
- 3.2.0
- 3.2.0a0
- 3.2.0a1
- 3.2.0b0
- 3.2.0rc0
- 3.2.1
- 3.2.2
- 3.2.3
- 3.2.4
- 3.2.5
- 3.2.6
- 3.2.7
- 3.2.8
- 3.2.9
- 3.3.0
- 3.3.0a1
- 3.3.0a2
- 3.3.0a3
- 3.3.0b0
- 3.3.0rc0
- 3.3.1
- 3.3.2
- 3.3.3
- 3.3.4
- 3.4.0
- 3.4.0a0
- 3.4.0b0
- 3.4.0rc0
- 3.4.1
- 3.4.2
- 3.4.3
- 3.4.4
- 3.4.5
- 3.4.6
- 3.4.7
- 3.4.8
- 3.5.0
- 3.5.0a0
- 3.5.0b0
- 3.5.0rc0
- 3.5.1
- 3.5.2
- 3.5.3
- 3.6.0
- 3.6.0a0
- 3.6.0a1
- 3.6.0a2
- 3.6.0a3
- 3.6.0a4
- 3.6.0a5
- 3.6.0b0
- 3.6.0rc0
- 3.6.0rc1
- 3.6.1
- 3.6.2
- 3.6.3
- 3.6.4
- 3.6.5
- 3.6.6
- 3.6.7
- 3.6.8
- 4.0.0
- 4.0.0a0
- 4.0.0a1
- 4.0.0a10
- 4.0.0a11
- 4.0.0a12
- 4.0.0a13
- 4.0.0a14
- 4.0.0a15
- 4.0.0a16
- 4.0.0a17
- 4.0.0a18
- 4.0.0a19
- 4.0.0a20
- 4.0.0a21
- 4.0.0a22
- 4.0.0a23
- 4.0.0a24
- 4.0.0a25
- 4.0.0a26
- 4.0.0a27
- 4.0.0a28
- 4.0.0a29
- 4.0.0a3
- 4.0.0a30
- 4.0.0a31
- 4.0.0a32
- 4.0.0a33
- 4.0.0a34
- 4.0.0a35
- 4.0.0a36
- 4.0.0a4
- 4.0.0a6
- 4.0.0a7
- 4.0.0a8
- 4.0.0a9
- 4.0.0b0
Update to 4.5.7
notebook PyPI
- Versions
- 7.0.0
- 7.0.1
- 7.0.2
- 7.0.3
- 7.0.4
- 7.0.5
- 7.0.6
- 7.0.7
- 7.0.8
- 7.1.0
- 7.1.0a0
- 7.1.0a1
- 7.1.0a2
- 7.1.0b0
- 7.1.0rc0
- 7.1.0rc1
- 7.1.1
- 7.1.2
- 7.1.3
- 7.2.0
- 7.2.0a0
- 7.2.0b0
- 7.2.0b1
- 7.2.0rc0
- 7.2.0rc1
- 7.2.1
- 7.2.2
- 7.2.3
- 7.3.0
- 7.3.0a0
- 7.3.0a1
- 7.3.0b0
- 7.3.0b1
- 7.3.0b2
- 7.3.0rc0
- 7.3.1
- 7.3.2
- 7.3.3
- 7.4.0
- 7.4.0a0
- 7.4.0a1
- 7.4.0a2
- 7.4.0a3
- 7.4.0b0
- 7.4.0b1
- 7.4.0b2
- 7.4.0b3
- 7.4.0rc0
- 7.4.1
- 7.4.2
- 7.4.3
- 7.4.4
- 7.4.5
- 7.4.6
- 7.4.7
- 7.5.0
- 7.5.0a0
- 7.5.0a1
- 7.5.0a2
- 7.5.0a3
- 7.5.0b0
- 7.5.0b1
- 7.5.0rc0
- 7.5.0rc1
- 7.5.1
- 7.5.2
- 7.5.3
- 7.5.4
- 7.5.5
- Affected ranges
- ECOSYSTEM: ≥ 7.0.0, < 7.5.6
Update to 7.5.6
jupyterlab Ubuntu:25.10
- Versions
- 4.0.11+ds1+~cs11.25.27-5
- 4.0.11+ds1+~cs11.25.27-6
- 4.0.11+ds1+~cs11.25.27-7
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
jupyterlab Ubuntu:26.10
- Versions
- 4.0.11+ds1+~cs11.25.27-9
- 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
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
jupyterlab Ubuntu:26.04:LTS
- 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
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
Original sources
- https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-mqcg-5x36-vfcg
- https://access.redhat.com/security/cve/CVE-2026-42557
- https://bugzilla.redhat.com/show_bug.cgi?id=2477086
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42557.json
- https://access.redhat.com/errata/RHSA-2026:43038
- https://access.redhat.com/errata/RHSA-2026:60520
- https://nvd.nist.gov/vuln/detail/CVE-2026-42557