What is CVE-2026-23528?

CVE-2026-23528 is a medium-severity vulnerability in Anaconda Dask, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-01-16.

How severe is CVE-2026-23528?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Anaconda Dask

CVE-2026-23528

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 Jupy…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (10.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Anaconda Dask
Dask Distributed — versions < 2026.1.0

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-23528?: CVE-2026-23528 is a medium-severity vulnerability in Anaconda Dask, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-01-16.
How severe is CVE-2026-23528?: Medium severity. CVSS v3 base score is 6.1 out of 10.