CVE-2026-110591 OW2 ASM 1.4.3 before 9.11 Excessive Resource Consumption via Analyzer
Attackers can cause denial of service by exhausting memory and CPU through crafted class files processed by the OW2 ASM library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-110591?
CVE-2026-110591 is a medium-severity denial of service vulnerability in OW2 ASM, published on 14 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
OW2 ASM 1.4.3 before 9.11 contains an excessive resource consumption vulnerability in Analyzer.analyze() that allows attackers to exhaust memory and CPU via crafted class files. Attackers can supply class files analysed through BasicVerifier, SimpleVerifier or SourceInterpreter to trigger unbounded per-instruction Frame allocation and fix point iterations, causing denial of service.
Weakness: CWE-770
Which versions are affected by CVE-2026-110591?
How do I fix CVE-2026-110591?
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-2026-110591 being exploited?
There is no known exploitation of CVE-2026-110591 in the wild and no public exploit code.
Sources
Also known as AZL-108363, AZL-108414, DEBIAN-CVE-2026-110591, GHSA-3qfp-6vqw-3cr8, UBUNTU-CVE-2026-110591.