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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Dask | 2026.0, 2026.1, 2026.2, 2026.3, 2026.4, 2026.5, 2026.6, 2026.7, 2026.8.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | dask | No fix yet | — |
| Debian 13 | dask | No fix yet | — |
| Debian 12 | dask | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | dask | No fix yet | — |
| Ubuntu 26.04 LTS | dask | No fix yet | — |
| Ubuntu 24.04 LTS | dask | No fix yet | — |
| Ubuntu 22.04 LTS | dask | No fix yet | — |
| Ubuntu 20.04 LTS | dask | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | dask | No fix yet | — |
References
- VDB-408543 | Dask Loader core.py from_npy_stack deserialization vdb-entry technical-description
- VDB-408543 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- CVE-2026-95897 | CVE Analysis and Report third-party-advisory
- Submit #953281 | dask ≤2026.8.0 rce third-party-advisory
- https://github.com/dask/dask/issues/12578 exploit issue-tracking
- https://github.com/dask/dask/ product