Dask Loader core.py from_npy_stack deserialization (CVE-2026-95897) | HOL Guard CVE

Medium · CVSS 5.1CVE-2026-95897

Dask Loader core.py from_npy_stack deserialization

Answer in brief

CVE-2026-95897 records a Medium severity (CVSS 5.1) vulnerability in Dask Loader core.py from_npy_stack deserialization. The current sources do not mark it as known exploited. The current feed maps n/a/Dask (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 23, 2026Updated Sep 23, 2026Source checked Sep 23, 2026First seen by HOL Sep 23, 2026Material review Sep 23, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.1
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 5.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps n/a/Dask (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
n/a/Daskgeneric	2026.0 \|\| 2026.1 \|\| 2026.2 \|\| 2026.3 \|\| 2026.4 \|\| 2026.5 \|\| 2026.6 \|\| 2026.7 \|\| 2026.8.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for n/a/Dask.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 23, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 23, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 23, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.