CVE-2021-46521

HIGH 7.8CVE-2021-46521 · Published 27/01/2022 · updated 17/06/2026

In short

CVE-2021-46521 is a HIGH (CVSS 7.8) vulnerability affecting mjs (cesanta).
Chance of exploitation in the next 30 days (EPSS): 0.73%, higher than 54.3% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
mjs cesanta	`= 2.20.0`	No fix yet

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

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