How severe is CVE-2026-23528?

CVE-2026-23528 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-23528 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-23528?

CVE-2026-23528 affects Anaconda Dask. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-23528?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-23528 have an EU (EUVD) identifier?

Yes. CVE-2026-23528 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2922.

When was CVE-2026-23528 published?

CVE-2026-23528 was published on 2026-01-16 and last updated on 2026-06-17.

CVE-2026-23528

CVE-2026-23528 is a medium-severity vulnerability in Anaconda Dask with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v4: 5.3
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-2922
Weakness: CWE-79
Affected product: Anaconda Dask
Published: 2026-01-16
Last modified: 2026-06-17

Description

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 user clicks on the malicious link it will open an error page in the Dask Dashboard via the Jupyter Lab proxy which will cause code to be executed by the default Jupyter Python kernel. This vulnerability is fixed in 2026.1.0.

Frequently asked questions

What is 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 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 user clicks on the malicious link it will open an error page in the Dask Dashboard via the Jupyter Lab proxy which will cause code to be executed by the default Jupyter Python kernel. This vulnerability is fixed in 2026.1.0.
How severe is CVE-2026-23528?: CVE-2026-23528 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-23528 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-23528?: CVE-2026-23528 affects Anaconda Dask. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-23528?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-23528 have an EU (EUVD) identifier?: Yes. CVE-2026-23528 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2922.
When was CVE-2026-23528 published?: CVE-2026-23528 was published on 2026-01-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:anaconda:dask:*:*:*:*:*:python:*:*

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