CVE-2026-42355: m2team Nanazip

Medium severity, CVSS 5.5. EPSS: 0.1% chance of exploitation in the next 30 days.

NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, an uncontrolled recursion vulnerability exists in the Electron Archive (ASAR) parser in NanaZip. When opening a crafted .asar file with deeply nested JSON in the header, both nlohmann::json::parse and the handler's GetAllPaths function recurse without depth limits, exhausting the thread stack and crashing the NanaZip process. This vulnerability is fixed in 6.0.1698.0.

Affected products

• m2team Nanazip: from 5.0.1250.0, before 6.0.1698.0 (fixed in 6.0.1698.0)

Published 2026-05-12. Last modified 2026-06-17.