CVE-2026-88350

An integer overflow vulnerability exists in MPack 1.1.1 in mpack_node_cstr_alloc() and mpack_node_utf8_cstr_alloc().

• Published Sep 22, 2026
• CVSS 6.2 medium
• 0.1% chance of exploitation in the next 30 days (EPSS)
• A fix is available

CVE-2026-88350 at the National Vulnerability Database