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Vulnerability · Published Oct 14, 2026 · Assigned by VulnCheck

CVE-2026-110591OW2 ASM 1.4.3 before 9.11 Excessive Resource Consumption via Analyzer

Medium 5.5

In plain English

A medium-severity resource allocation without limits in ASM from OW2. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.2%top 92.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12asmno fix listedDEBIAN-CVE-2026-110591
Debian:13asmno fix listedDEBIAN-CVE-2026-110591
Debian:14asm9.11.1-1DEBIAN-CVE-2026-110591
Ubuntu:22.04:LTSasmno fix listedUBUNTU-CVE-2026-110591
Ubuntu:24.04:LTSasmno fix listedUBUNTU-CVE-2026-110591
Ubuntu:26.04:LTSasmno fix listedUBUNTU-CVE-2026-110591
Ubuntu:26.10asmno fix listedUBUNTU-CVE-2026-110591

Affected products (as reported)

VendorProductVersions
OW2 ASM 1.4.3 – before 9.11

Weakness: CWE-770 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References