CVE-2026-86420 ImageMagick before 7.1.2-30 Denial of Service Memory Budget
Attackers can cause denial of service in ImageMagick by exhausting memory budget through repeated OpenPixelCache operation failures.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-86420?
CVE-2026-86420 is a medium-severity denial of service vulnerability in Imagemagick Imagemagick, published on 7 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
ImageMagick before 7.1.2-30 and 6.9.13-55 fails to properly lower the memory budget when an operation inside OpenPixelCache fails. Repeated triggering of such failures can exhaust the process memory budget and result in a denial of service.
Weakness: CWE-400
Which versions are affected by CVE-2026-86420?
It affects 1 product.
Products include Imagemagick Imagemagick.
How do I fix CVE-2026-86420?
Upgrade to a fixed version.
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-2026-86420 being exploited?
There is no known exploitation of CVE-2026-86420 in the wild and no public exploit code.
Other vulnerabilities in Imagemagick Imagemagick
Sources
Also known as CLSA-2026-1789463409, CLSA-2026-1789463769, CLSA-2026-1789650252, CLSA-2026-1789650963, DEBIAN-CVE-2026-86420, ECHO-518b-ce96-3f3b and 5 more.