CVE-2026-95897: Dask Loader core.py from_npy_stack deserialization

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-23 · updated 2026-09-23
Weakness: CWE-20

Description

A security vulnerability has been detected in Dask up to 2026.8.0. This affects the function from_npy_stack of the file dask/array/core.py of the component Loader. Such manipulation leads to deserialization. The attack can be launched remotely. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Affected products

dask: 2026.0, 2026.1, 2026.2, 2026.3, 2026.4, 2026.5 (+3)

References

https://github.com/dask/dask/
https://github.com/dask/dask/issues/12578
https://vuldb.com/cve/CVE-2026-95897
https://vuldb.com/submit/953281
https://vuldb.com/vuln/408543
https://vuldb.com/vuln/408543/cti

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