CVE-2021-46521: Cesanta Mjs

High severity, CVSS 7.8. EPSS: 0.7% chance of exploitation in the next 30 days.

Cesanta MJS v2.20.0 was discovered to contain a global buffer overflow via c_vsnprintf at mjs/src/common/str_util.c.

Affected products

• Cesanta Mjs: version 2.20.0 only

Published 2022-01-27. Last modified 2026-06-17.