Resource exhaustion in Ow2 Asm
CVE-2026-110591
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.
Published .
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/468 (patch)
- gitlab.ow2.org/asm/asm/-/commit/4632a2283f1192fd0e93035661b49568a7cb8b6c (patch)
- gitlab.ow2.org/asm/asm/-/blob/ASM_9_10_1/asm-analysis/src/main/java/org/objectw… (technical-description)
- asm.ow2.io/versions.html (release-notes)
- www.vulncheck.com/advisories/ow2-asm-1.4.3-before-9.11-excessive-resource-consu… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-110591?
- CVE-2026-110591 is a medium-severity vulnerability in Ow2 Asm, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.5/10. Published 2026-10-14.
- How severe is CVE-2026-110591?
- Medium severity. CVSS v3 base score is 5.5 out of 10.