{"id":"CVE-2026-90473","summary":"msgpack-java through 0.9.12 Integer Overflow via MAP32","details":"msgpack-java through 0.9.12 contains an integer overflow vulnerability in MessageUnpacker.skipValue() when processing MAP32 containers with large element counts. Attackers can supply a MAP32 element count at or above 0x40000000 that wraps when doubled, causing the parser cursor to desynchronize and attacker-controlled data to be returned in place of later fields.","modified":"2026-09-14T03:46:32.867909Z","published":"2026-09-12T11:06:12.224Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-190"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90473.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90473.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90473"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/msgpack-java-through-0.9.12-integer-overflow-via-map32"},{"type":"REPORT","url":"https://github.com/msgpack/msgpack-java/issues/1014"},{"type":"PACKAGE","url":"https://github.com/msgpack/msgpack-java"},{"type":"ARTICLE","url":"https://github.com/msgpack/msgpack-java/blob/v0.9.12/msgpack-core/src/main/java/org/msgpack/core/MessageUnpacker.java#L573-L581"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/msgpack/msgpack-java","events":[{"introduced":"0"},{"fixed":"ca3fa54c8dc3a020ab554a7289af0927bbbf1f62"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"0.9.12"},{"fixed":"0.9.12"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"versions":["v0.9.11","v0.9.10","v0.9.9","v0.9.8","v0.9.7","v0.9.6","v0.9.5","v0.9.4","v0.9.3","v0.9.2","v0.9.1","v0.9.0","v0.8.24","v0.8.23","v0.8.22","0.8.22","0.8.21","0.8.20","0.8.19","0.8.18","0.8.17","0.8.16","v0.8.15","0.8.15","0.8.14","0.8.13","0.8.12","0.8.11","0.8.10","0.8.9","0.8.8","0.8.7","0.8.6","0.8.5","0.8.4","0.7.1","0.8.3","0.8.2","0.8.1","0.8.0","0.7.0","0.7.0-M6","0.7.0-p9","0.7.0-p8","0.7.0-p7","0.7.0-p6","0.7.0-p5","0.7.0-p4","msgpack-0.6.8","msgpack-0.6.7","msgpack-0.6.6","msgpack-0.6.5","msgpack-0.6.4","msgpack-0.6.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90473.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"}]}