CVE-2021-26199

MEDIUM 6.5CVE-2021-26199 · Published 10/06/2021 · updated 17/06/2026

In short

CVE-2021-26199 is a MEDIUM (CVSS 6.5) vulnerability affecting jerryscript (jerryscript).
Chance of exploitation in the next 30 days (EPSS): 0.86%, higher than 58.4% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
jerryscript jerryscript	`= 2.4.0`	No fix yet

An issue was discovered in JerryScript 2.4.0. There is a heap-use-after-free in ecma_bytecode_ref in ecma-helpers.c file.

Running one of these products? Scan your site to see whether it exposes a vulnerable version.