CVE-2025-15564 Mapnik value.cpp operator divide by zero
A local attacker can cause a denial of service in the Mapnik library via a divide-by-zero error in value.cpp, requiring local access to exploit.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-15564?
CVE-2025-15564 is a medium-severity denial of service vulnerability in Mapnik, published on 7 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability has been found in Mapnik up to 4.2.0. This vulnerability affects the function mapnik::detail::mod<...>::operator of the file src/value.cpp. The manipulation leads to divide by zero. The attack needs to be performed locally. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2025-15564?
It affects 1 product.
Products include Mapnik Mapnik.
How do I fix CVE-2025-15564?
No fix published yet.
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-2025-15564 being exploited?
There is no known exploitation of CVE-2025-15564 in the wild and no public exploit code.
Other vulnerabilities in Mapnik
Sources
Also known as DEBIAN-CVE-2025-15564, GHSA-4r58-h5cf-8qgj, UBUNTU-CVE-2025-15564.