CVE-2026-110257
CVE-2026-110257
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.
Published · last modified .
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.
Weakness classification (CWE)
References
- gitlab.ow2.org/asm/asm/-/merge_requests/456 (patch)
- gitlab.ow2.org/asm/asm/-/commit/eb5fa95bb0670eaec2ecf9b8a3a501b48e5a967c (patch)
- gitlab.ow2.org/asm/asm/-/blob/ASM_9_10_1/asm/src/main/java/org/objectweb/asm/Cl… (technical-description)
- asm.ow2.io/versions.html (release-notes)
- www.vulncheck.com/advisories/ow2-asm-5.0-before-9.11-excessive-memory-allocatio… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-110257?
- CVE-2026-110257 is a medium-severity vulnerability, classified under CWE-789. CVSS score: 5.5/10. Published 2026-10-14.
- How severe is CVE-2026-110257?
- Medium severity. CVSS v3 base score is 5.5 out of 10.