Vulnerability in Ow2 Asm
CVE-2026-110270
OW2 ASM 3.0 before 9.11 contains an uncontrolled memory allocation vulnerability in the asm-commons JSRInlinerAdapter that inlines JSR/RET subroutines without memory or work limits. Attackers can supply a crafted class file with nested subroutines to force O(2^n) memory allocation, causing an OutOfMemoryError that crashes the JVM.
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.
Affected products
Weakness classification (CWE)
References
- gitlab.ow2.org/asm/asm/-/merge_requests/466 (patch)
- gitlab.ow2.org/asm/asm/-/commit/f2b988af48719f85a274f2a05e37bc55c0cd22a1 (patch)
- gitlab.ow2.org/asm/asm/-/blob/ASM_9_10_1/asm-commons/src/main/java/org/objectwe… (technical-description)
- asm.ow2.io/versions.html (release-notes)
- www.vulncheck.com/advisories/ow2-asm-3.0-before-9.11-exponential-memory-allocat… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-110270?
- CVE-2026-110270 is a medium-severity vulnerability in Ow2 Asm, classified under Inefficient Algorithmic Complexity. CVSS score: 5.5/10. Published 2026-10-14.
- How severe is CVE-2026-110270?
- Medium severity. CVSS v3 base score is 5.5 out of 10.