OW2 ASM 3.1 before 9.11 Excessive Memory Allocation in AdviceAdapter

Advisories

OW2 ASM 3.1 before 9.11 Excessive Memory Allocation in AdviceAdapter

Severity: medium
Date: 10/14/2026
Affecting: ASM >= 3.1, < 9.11
CVE: CVE-2026-110262
CWE: CWE-770 Allocation of Resources Without Limits or Throttling
CVSS: 4.8
CVSS V4 Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
References: https://gitlab.ow2.org/asm/asm/-/merge_requests/464
https://gitlab.ow2.org/asm/asm/-/commit/b7e6c88801790c9da214efd0498aecb9402796a0
https://gitlab.ow2.org/asm/asm/-/blob/ASM_9_10_1/asm-commons/src/main/java/org/objectweb/asm/commons/AdviceAdapter.java#L96
ASM 9.11 Release Notes
Credit: Eric Bruneton
Description: OW2 ASM 3.1 before 9.11 contains an excessive memory allocation vulnerability in the asm-commons AdviceAdapter that allows attackers to exhaust memory by supplying crafted class files. Attackers can craft bytecode with many forward jump targets in constructors, causing unbounded stack copies in forwardJumpStackFrames and allocation of hundreds of megabytes, leading to denial of service.

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