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THREAT OPS › Threat News › [NVD] CVE-2026-90473 (MEDIUM 5.3) — 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 t

[NVD] CVE-2026-90473 (MEDIUM 5.3) — 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 t

mednvdPublished 2026-09-12

CVE-2026-90473 CVSS: 5.3 MEDIUM Published: 2026-09-12T11:16:34.347

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 r

Indicators of compromise

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-90473