CVE-2026-88351 | BDVDB-2026-378659 Detail

Description#

An integer overflow vulnerability exists in the MPack Node API in MPack 1.1.1 on 32-bit platforms. When parsing a specially crafted MessagePack array32 or map32 object with an excessively large element count, the page allocation size calculation in mpack_tree_parse_children() can overflow size_t and produce an undersized allocation. Subsequent parsing writes mpack_node_data_t records beyond the allocated heap buffer, resulting in heap-buffer-overflow, memory corruption, and denial of service.

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Exploit#

History#

1. Version 12026-09-24Record published in the CVE List.
2. Version 22026-09-25Most recent update recorded in the CVE List.