CVE-2021-46538 json
Cesanta MJS v2.20.0 was discovered to contain a SEGV vulnerability via gc_compact_strings at src/mjs_gc.c.
published 2022-01-27 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-33214
- cvss
- 5.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 49%
- public exploits
- 0
- none known
Summary
Cesanta MJS v2.20.0 was discovered to contain a SEGV vulnerability via gc_compact_strings at src/mjs_gc.c. This vulnerability can lead to a Denial of Service (DoS).
Patch / fix
- github.com/cesanta/mjs/issues/216 advisory
Exploit prediction
0.61% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/cesanta/mjs/issues/216 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:N/A:P |
References
-
github.com
/cesanta/mjs/issues/216
exploit, issue-tracking, patch, third-party-advisory
Sources
- CVE List CVE-2021-46538
- NVD CVE-2021-46538
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