Is distributed affected by CVE-2026-23528?

PyPI distributed is affected in <2026.1.0.

Is CVE-2026-23528 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.2%.

medium

CVE-2026-23528

Q: Is CVE-2026-23528 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.2%.

PyPI · distributed

Summary

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 dashb

Severity: medium
EPSS: 0.2% (p10)
Also known as: GHSA-c336-7962-wfj2, PYSEC-2026-169
Published: 2026-01-16

References

https://github.com/dask/distributed/security/advisories/GHSA-c336-7962-wfj2
https://github.com/dask/distributed/commit/ab72092a8a938923c2bb51a2cd14ca26614827fa

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.