CVE-2021-46518
HIGHCVSS 7.8/10EPSS 0.73%
Last modified
CVE-2021-46518 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Cesanta MJS v2.20.0 was discovered to contain a heap buffer overflow via mjs_disown at src/mjs_core.c.. EPSS estimates a 0.73% chance of exploitation in the next 30 days.
Description
Cesanta MJS v2.20.0 was discovered to contain a heap buffer overflow via mjs_disown at src/mjs_core.c.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cesanta | Mjs | 2.20.0 |
References
- https://github.com/cesanta/mjs/issues/195Exploit, Issue Tracking, Third Party Advisory
- https://github.com/cesanta/mjs/issues/195Exploit, Issue Tracking, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-46518?
Cesanta MJS v2.20.0 was discovered to contain a heap buffer overflow via mjs_disown at src/mjs_core.c.
How severe is CVE-2021-46518?
CVE-2021-46518 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.73% probability of exploitation in the next 30 days.
How do I fix CVE-2021-46518?
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.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-46512Cesanta MJS v2.20.0 was discovered to contain a SEGV vulnera…5.5
- CVE-2021-46513Cesanta MJS v2.20.0 was discovered to contain a global buffe…7.8
- CVE-2021-46514There is an Assertion 'ppos != NULL && mjs_is_number(*ppos)'…5.5
- CVE-2021-46515There is an Assertion `mjs_stack_size(&mjs->scopes) >= scope…5.5
- CVE-2021-46516Cesanta MJS v2.20.0 was discovered to contain a SEGV vulnera…5.5
- CVE-2021-46517There is an Assertion `mjs_stack_size(&mjs->scopes) > 0' fai…5.5
- CVE-2021-46519Cesanta MJS v2.20.0 was discovered to contain a heap buffer …7.8
- CVE-2021-46520Cesanta MJS v2.20.0 was discovered to contain a heap buffer …7.8
- CVE-2021-46521Cesanta MJS v2.20.0 was discovered to contain a global buffe…7.8
- CVE-2021-46522Cesanta MJS v2.20.0 was discovered to contain a heap buffer …7.8
- CVE-2021-46523Cesanta MJS v2.20.0 was discovered to contain a heap buffer …7.8
- CVE-2021-46524Cesanta MJS v2.20.0 was discovered to contain a heap buffer …7.8
Are you affected by CVE-2021-46518?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST