CVE-2026-90473

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...

CVE-2026-90473: Integer Overflow or Wraparound

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...