CVE-2026-110257 MEDIUM

CVE-2026-110257: OW2 ASM 5.0 before 9.11 Excessive Memory Allocation via BootstrapMethods Attribute

Vendor Ow2
Product ASM
Weakness CWE-789
Published October 14, 2026
Last update October 14, 2026
View on NVD All CVEs

CVSS base score

6.8/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction —
Confidentiality —
Integrity —

CVSS 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

What the vulnerability does

01Description

OW2 ASM 5.0 before 9.11 contains an excessive memory allocation vulnerability in ClassReader.readBootstrapMethodsAttribute() that sizes an int array from num_bootstrap_methods without validating attribute_length. Attackers can supply a crafted class file of about 100 bytes that forces roughly 2 GB allocation, causing an OutOfMemoryError that crashes the JVM or consuming thread.

Key dates

02Disclosure timeline

October 14, 2026 CVE published
October 14, 2026 Record updated