Vulnerability in Ow2 Asm
CVE-2026-110261
OW2 ASM 3.0 before 9.11 contains a denial of service vulnerability that allows attackers to exhaust CPU by supplying crafted class files processed with ClassWriter.COMPUTE_FRAMES. Attackers can craft methods that make the unbounded MethodWriter.computeAllFrames() fix point algorithm converge slowly, tying up transforming threads for unbounded time.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- gitlab.ow2.org/asm/asm/-/merge_requests/463 (patch)
- gitlab.ow2.org/asm/asm/-/commit/ab68bbd2521359b7c8cd3517c6331ced3d817ed0 (patch)
- gitlab.ow2.org/asm/asm/-/blob/ASM_9_10_1/asm/src/main/java/org/objectweb/asm/Me… (technical-description)
- asm.ow2.io/versions.html (release-notes)
- www.vulncheck.com/advisories/ow2-asm-3.0-before-9.11-excessive-cpu-consumption-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-110261?
- CVE-2026-110261 is a medium-severity vulnerability in Ow2 Asm, classified under Inefficient Algorithmic Complexity. CVSS score: 5.5/10. Published 2026-10-14.
- How severe is CVE-2026-110261?
- Medium severity. CVSS v3 base score is 5.5 out of 10.