CVE-2021-26194

Name: CVE-2021-26194
Creator: NVD / NIST
Published: 2021-06-10T23:15:08.333+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.94%

Last modified Jun 17, 2026

CVE-2021-26194 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. An issue was discovered in JerryScript 2.4.0. There is a heap-use-after-free in ecma_is_lexical_environment in the ecma-helpers.c file.. EPSS estimates a 0.94% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS Probability

0.94%

56.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Jerryscript	Jerryscript	2.4.0

References

https://github.com/jerryscript-project/jerryscript/issues/4445Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/jerryscript-project/jerryscript/issues/4445Exploit, Issue Tracking, Patch, Third Party Advisory

Timeline

Published: Jun 10, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26194?

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

How severe is CVE-2021-26194?

CVE-2021-26194 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.94% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26194?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-26194?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST