CVE-2026-110260 OW2 ASM 3.0 before 9.11 Quadratic Memory Allocation via Exception Handlers
Attackers can crash the JVM via excessive memory allocation in OW2 ASM when processing crafted class files with overlapping exception handlers.
- 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-2026-110260?
CVE-2026-110260 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 3.0 before 9.11 contains a quadratic memory allocation vulnerability in MethodWriter.computeMaxStackAndLocal() and computeAllFrames() when using COMPUTE_MAXS or COMPUTE_FRAMES. Attackers can supply a crafted class file with thousands of overlapping exception handlers, causing excessive Edge allocations and an OutOfMemoryError that crashes the JVM.
Weakness: CWE-407
Which versions are affected by CVE-2026-110260?
How do I fix CVE-2026-110260?
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-2026-110260 being exploited?
There is no known exploitation of CVE-2026-110260 in the wild and no public exploit code.
Sources
Also known as AZL-108369, AZL-108408, DEBIAN-CVE-2026-110260, GHSA-f8m6-wmrx-8vh2, UBUNTU-CVE-2026-110260.