JupyterLab: Cross-site scripting (XSS) via crafted settings file (`overrides.json`)
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Active
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · High · Low
- Fix status
- Partial Red Hat: 4 fixed, 1 without a fix
Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-79.
Summary
jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. From 3.3.0 until 4.5.10 and 4.6.2, JupyterLab allows notebook settings to be shared and applied through an overrides.json file using the Import button in the Settings Editor. In packages/notebook-extension/schema/tracker.json and packages/notebook-extension/src/index.ts, the sideBySideLeftMarginOverride and sideBySideRightMarginOverride settings are not properly validated before being inserted into style content, allowing a crafted settings file to contain instructions that execute as code instead of only changing display preferences. A user can import the malicious file, or an attacker with access to a shared settings location can plant an overrides.json that is applied automatically. The embedded code runs with the affected user's access and can read or modify notebooks and files and run code through the notebook server, including on a connected kernel. This issue is fixed in versions 4.5.10 and 4.6.2.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| jupyterlab | jupyterlab | 3.3.0 to before 4.5.10; 4.6.0 to before 4.6.2 | 4.5.10, 4.6.2 | Patch available | CNA |
| — | jupyterlab (PyPI) | 4.6.0 to before 4.6.2 | 4.6.2 | Patch available | GHSA-pppj-hq3g-57pj |
| — | jupyterlab (PyPI) | 3.3.0 to before 4.5.10 | 4.5.10 | Patch available | GHSA-pppj-hq3g-57pj |
- jupyterlab Vendorjupyterlab Affected 3.3.0 to before 4.5.10; 4.6.0 to before 4.6.2 Fixed in 4.5.10, 4.6.2 Patch available CNA
- jupyterlab (PyPI) Vendor— Affected 4.6.0 to before 4.6.2 Fixed in 4.6.2 Patch available GHSA-pppj-hq3g-57pj
- jupyterlab (PyPI) Vendor— Affected 3.3.0 to before 4.5.10 Fixed in 4.5.10 Patch available GHSA-pppj-hq3g-57pj
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:jupyter:jupyterlab:*:*:*:*:*:*:*:* | — | — | jupyterlab |
- cpe:2.3:a:jupyter:jupyterlab:*:*:*:*:*:*:*:* Versions — — ·jupyterlab
Remediation
- Fix · CNA jupyterlab (jupyterlab) Fixed in 4.5.10, 4.6.2
- Fix · GHSA-pppj-hq3g-57pj jupyterlab (PyPI) Fixed in 4.6.2 Advisory →
- Fix · GHSA-pppj-hq3g-57pj jupyterlab (PyPI) Fixed in 4.5.10 Advisory →
Red Hat 5 advisories
- RHSA-2026:87410 Released 2026-10-21 · Red Hat rating CriticalRHOAI 2.25.12 - Red Hat OpenShift AI
- Red Hat OpenShift AI 2.25 registry.redhat.io/rhoai/odh-built-in-detector-rhel9, registry.redhat.io/rhoai/odh-caikit-nlp-rhel9, registry.redhat.io/rhoai/odh-codeflare-operator-rhel9 +47
- RHSA-2026:86891 Released 2026-10-21 · Red Hat rating CriticalRHOAI 3.5.2 - Red Hat OpenShift AI
- Red Hat OpenShift AI 3.5 registry.redhat.io/rhoai/odh-automl-rhel9, registry.redhat.io/rhoai/odh-built-in-detector-rhel9, registry.redhat.io/rhoai/odh-cli-rhel9 +47
- RHSA-2026:84734 Released 2026-10-19 · Red Hat rating CriticalRHOAI 3.4.5 - Red Hat OpenShift AI
- Red Hat OpenShift AI 3.4 registry.redhat.io/rhoai/odh-ai-gateway-payload-processing-rhel9, registry.redhat.io/rhoai/odh-automl-rhel9, registry.redhat.io/rhoai/odh-autorag-rhel9 +47
Show 2 more Red Hat advisories
- RHSA-2026:73987 Released 2026-09-30 · Red Hat rating CriticalRHOAI 3.3.7 - Red Hat OpenShift AI
- Red Hat OpenShift AI 3.3 registry.redhat.io/rhoai/odh-built-in-detector-rhel9, registry.redhat.io/rhoai/odh-dashboard-rhel9, registry.redhat.io/rhoai/odh-data-science-pipelines-argo-argoexec-rhel9 +47
- RHSA-2026:65126 Released 2026-09-08 · Red Hat rating ImportantRHOAI 2.25.11 - Red Hat OpenShift AI
- Red Hat OpenShift AI 2.25 registry.redhat.io/rhoai/odh-built-in-detector-rhel9, registry.redhat.io/rhoai/odh-caikit-tgis-serving-rhel9, registry.redhat.io/rhoai/odh-dashboard-rhel9 +47
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat OpenShift AI (RHOAI) | Affected | No fix yet |
| Red Hat OpenShift AI 2.25 | Fixed | RHSA-2026:65126, RHSA-2026:87410 |
| Red Hat OpenShift AI 3.3 | Fixed | RHSA-2026:73987 |
| Red Hat OpenShift AI 3.4 | Fixed | RHSA-2026:84734 |
| Red Hat OpenShift AI 3.5 | Fixed | RHSA-2026:86891 |
Not affected: 6 products
- Migration Toolkit for Applications 8
- Red Hat OpenShift AI (RHOAI)
- Red Hat OpenShift AI 2.25
- Red Hat OpenShift AI 3.3
- Red Hat OpenShift AI 3.4
- Red Hat OpenShift AI 3.5
Timeline
- 2026-10-02 Threatist record created from CVE-2026-73417
- 2026-10-03 Alias added: GHSA-pppj-hq3g-57pj
- 2026-10-07 Fix available: RHSA-2026:73987 · Red Hat
- 2026-10-20 Fix available: RHSA-2026:84734 · Red Hat
- 2026-10-20 Fix available: Red Hat OpenShift AI 3.4 · Red Hat
- 2026-10-22 Fix available: RHSA-2026:86891 · Red Hat
- 2026-10-22 Fix available: RHSA-2026:87410 · Red Hat
- 2026-10-23 Fix available: Red Hat OpenShift AI 3.5 · Red Hat
References
Other 11
- https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-pppj-hq3g-57pj
- https://github.com/jupyterlab/jupyterlab/pull/19184
- https://github.com/jupyterlab/jupyterlab/pull/19185
- https://github.com/jupyterlab/jupyterlab/pull/19186
- https://github.com/jupyterlab/jupyterlab/commit/9365f020baec5221deaf11535ed554c06637c999
- https://github.com/jupyterlab/jupyterlab/commit/be9303f5bcd5308eaeae953c5a3c903046682c2c
- https://github.com/jupyterlab/jupyterlab/commit/f1beab4a2027af4719d6edc07d52d6cf5a39a432
- https://github.com/jupyterlab/jupyterlab/releases/tag/v4.5.10
- https://github.com/jupyterlab/jupyterlab/releases/tag/v4.6.2
- https://github.com/jupyterlab/jupyterlab/releases/tag/v4.7.0a1
- https://github.com/jupyterlab/jupyterlab
More jupyterlab vulnerabilities
- TI-2026-32161 Jupyter Enterprise Gateway Has Kubernetes Manifest Injection via Jinja2 Template Rendering CVSS 4.0CRITICAL 10.0
- TI-2026-32160 Jupyter Enterprise Gateway: Jinja2 Template Server Side Template Injection results in Remote Code Execution CVSS 4.0CRITICAL 10.0
- TI-2026-32159 Jupyter Enterprise Gateway: ContainerProcessProxy._enforce_prohibited_ids can be Bypassed CVSS 3.1CRITICAL 9.8
- TI-2024-26623 Remote Code Execution (RCE) vulnerability in jupyterlab extension template `update-integration-tests` GitHub Action CVSS 3.1CRITICAL 10.0
- TI-2026-78983 Path traversal in nbconvert lets crafted notebooks write files CVSS 4.0HIGH 8.8
- TI-2026-39372 JupyterLab Git: Stored XSS leading to RCE CVSS 4.0CRITICAL 9.3
Sources
- CVE-2026-73417 · CVE Program
- CVE-2026-73417 · NVD
- FIRST EPSS
- GHSA-pppj-hq3g-57pj · GitHub Advisory Database · CC BY 4.0
- CVE-2026-73417 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences