{"id":"CVE-2026-110257","revision":"d2851c4dd712420eb4795c3ecb2afa50","records":[{"revision":"d2851c4dd712420eb4795c3ecb2afa50","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-110257","aliases":[],"title":"OW2 ASM 5.0 before 9.11 Excessive Memory Allocation via BootstrapMethods Attribute","description":"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.","state":0,"publishedAt":"2026-10-14T14:16:30.933+00:00","modifiedAt":"2026-10-14T15:55:22.107+00:00","affected":[{"ecosystem":"https://repo1.maven.org/maven2/","name":"ASM","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"OW2\",\n                    \"product\": \"ASM\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"5.0\",\n                            \"lessThan\": \"9.11\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:maven/org.ow2.asm/asm\",\n                    \"collectionURL\": \"https://repo1.maven.org/maven2/\",\n                    \"repo\": \"https://gitlab.ow2.org/asm/asm\"\n                }"}],"metrics":[{"system":"CVSS 4.0","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","score":6.8,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","score":5.5,"severity":"MEDIUM"}],"references":["https://gitlab.ow2.org/asm/asm/-/merge_requests/456","https://gitlab.ow2.org/asm/asm/-/commit/eb5fa95bb0670eaec2ecf9b8a3a501b48e5a967c","https://gitlab.ow2.org/asm/asm/-/blob/ASM_9_10_1/asm/src/main/java/org/objectweb/asm/ClassReader.java#L3497","https://asm.ow2.io/versions.html","https://www.vulncheck.com/advisories/ow2-asm-5.0-before-9.11-excessive-memory-allocation-via-bootstrapmethods-attribute"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-110257","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-110257","identifiers":["CVE-2026-110257"]},"retained":false,"historicalAffected":[]}],"coverage":[]}