CVE-2026-18772 Denial of service in rlottie

Medium 6.5 Published 4 Aug 2026 Updated 12 Aug 2026

Attackers can cause denial of service via exponential data expansion in the rlottie library due to improper memory allocation controls.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2026-18772?

CVE-2026-18772 is a medium-severity denial of service vulnerability in Samsung Open Source rlottie, published on 4 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Improperly controlled sequential memory allocation vulnerability in Samsung Open Source rlottie allows Exponential Data Expansion.

Weakness: CWE-1325

Which versions are affected by CVE-2026-18772?

It affects 1 product.

Products include Samsung Rlottie.

How do I fix CVE-2026-18772?

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-2026-18772 being exploited?

There is no known exploitation of CVE-2026-18772 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2026-18772, GHSA-9hrp-c4q8-hf75, UBUNTU-CVE-2026-18772.