OW2 ASM 1.4.3 before 9.11 Excessive Resource Consumption via Analyzer

Advisories

OW2 ASM 1.4.3 before 9.11 Excessive Resource Consumption via Analyzer

Severity: medium
Date: 10/14/2026
Affecting: ASM >= 1.4.3, < 9.11
CVE: CVE-2026-110591
CWE: CWE-770 Allocation of Resources Without Limits or Throttling
CVSS: 6.8
CVSS V4 Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
References: https://gitlab.ow2.org/asm/asm/-/merge_requests/468
https://gitlab.ow2.org/asm/asm/-/commit/4632a2283f1192fd0e93035661b49568a7cb8b6c
https://gitlab.ow2.org/asm/asm/-/blob/ASM_9_10_1/asm-analysis/src/main/java/org/objectweb/asm/tree/analysis/Analyzer.java#L150
ASM 9.11 Release Notes
Credit: Eric Bruneton
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.

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