CVE-2021-46510

Name: CVE-2021-46510
Creator: NVD / NIST
Published: 2022-01-27T21:15:09.507+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.61%

Last modified Jun 17, 2026

CVE-2021-46510 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. There is an Assertion `s < mjs->owned_strings.buf + mjs->owned_strings.len' failed at src/mjs_gc.c in Cesanta MJS v2.20.0.. EPSS estimates a 0.61% chance of exploitation in the next 30 days.

Description

There is an Assertion `s < mjs->owned_strings.buf + mjs->owned_strings.len' failed at src/mjs_gc.c in Cesanta MJS v2.20.0.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.61%

44.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-617

Affected Software

Vendor	Product	Versions
Cesanta	Mjs	2.20.0

References

https://github.com/cesanta/mjs/issues/185Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/cesanta/mjs/issues/185Exploit, Issue Tracking, Patch, Third Party Advisory

Timeline

Published: Jan 27, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-46510?

There is an Assertion `s < mjs->owned_strings.buf + mjs->owned_strings.len' failed at src/mjs_gc.c in Cesanta MJS v2.20.0.

How severe is CVE-2021-46510?

CVE-2021-46510 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.61% probability of exploitation in the next 30 days.

How do I fix CVE-2021-46510?

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-2021-46510?

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

Scan your code now

Source: NVD / NIST