CVE-2026-10705 dask HLL hyperloglog.py nunique_approx resource consumption
Remote attackers can cause resource exhaustion in dask via the nunique_approx function, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-10705?
CVE-2026-10705 is a low-severity denial of service vulnerability in dask, published on 3 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw has been found in dask up to 3.0. Affected by this issue is the function nunique_approx of the file dask/dataframe/hyperloglog.py of the component HLL Handler. This manipulation causes resource consumption. The attack is possible to be carried out remotely. A high degree of complexity is needed for the attack. The exploitation is known to be difficult. The pull request to fix this issue awaits acceptance.
Which versions are affected by CVE-2026-10705?
How do I fix CVE-2026-10705?
No fix has been published for CVE-2026-10705 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-10705 being exploited?
There is no known exploitation of CVE-2026-10705 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-10705, GHSA-qp9q-4rh4-m8jc, UBUNTU-CVE-2026-10705.