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 p
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.
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-67338
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-67338 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for JupyterLab
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- highGHSA-pppj-hq3g-57pj: JupyterLab: Cross-site scripting (XSS) via crafted settings file (`overrides.json`)ghsa · 2026-07-22
- highGHSA-gx64-gj6p-pc4c: JupyterLab: Image viewer allows XSS when opening malicious image in new browser tabghsa · 2026-07-22
- mediumGHSA-89vp-jrxv-24w8: JupyterLab: PyPI extension blocklist package-name canonicalization bypassghsa · 2026-07-22
- mediumGHSA-h5v5-8746-g7mm: JupyterLab PluginManager lock-rule enforcement bypassghsa · 2026-07-22
- lowGHSA-whvh-wf3x-g77j: JupyterLab: Allowlist/blocklist check in `PyPIExtensionManager.install()` not enforced fo…ghsa · 2026-07-22
- highCVE-2026-54528: JupyterLab Git is a Git extension for JupyterLab. Prior to 0.54.0, jupyterlab-git uses fnmatch…nvd · 2026-07-08
More from NVD Recent CVEs
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- mediumCVE-2026-67354: guzzlehttp/guzzle versions before 7.15.1 contain an information disclosure vulnerability in Re…2026-08-01
- mediumCVE-2026-67353: guzzlehttp/guzzle versions before 7.15.1 contain a denial of service vulnerability in the Cook…2026-08-01
- highCVE-2026-67352: luci-app-https-dns-proxy contains a stored cross-site scripting vulnerability in the resolver_…2026-08-01
- mediumCVE-2026-67344: ArcadeDB before 26.7.2 fails to enforce the UPDATE_SCHEMA database permission on the ALTER TYP…2026-08-01