PatchTheCVECVE-2026-23528: Dask distributed is a distributed task scheduler for Dask
CVE-2026-23528 is a medium-severity flaw (CVSS 6.1) affecting dask. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Dask distributed is a distributed task scheduler for Dask. Prior to 2026.1.0, when Jupyter Lab, jupyter-server-proxy, and Dask distributed are all run together, it is possible to craft a URL which will result in code being executed by Jupyter due to a cross-side-scripting (XSS) bug in the Dask dashboard. It is possible for attackers to craft a phishing URL that assumes Jupyter Lab and Dask may be running on localhost and using default ports. If a
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-23528?
dask: upgrade to 2026.1.0. Exact commands for each OS are on this page.
Is CVE-2026-23528 being exploited?
CVE-2026-23528 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-23528 affect?
CVE-2026-23528 affects dask. Severity is medium (CVSS 6.1). Dask distributed is a distributed task scheduler for Dask. Prior to 2026.1.0, when Jupyter Lab, jupyter-server-proxy, and Dask distributed are all run together, it is possible to craft a URL which will result in code being executed by Jupyt
How urgent is CVE-2026-23528?
Priority 25/100. No elevated risk signals yet.