What is CVE-2021-46483?

CVE-2021-46483 is a high-severity vulnerability in Jsish, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2022-01-25.

How severe is CVE-2021-46483?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Jsish

CVE-2021-46483

Jsish v3.5.0 was discovered to contain a heap buffer overflow via BooleanConstructor at src/jsiBool.c.

Vulnerability class: Buffer Overflow

Published 2022-01-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (56.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Jsish — versions 3.5.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/pcmacdon/jsish/issues/62 (Exploit, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-46483?: CVE-2021-46483 is a high-severity vulnerability in Jsish, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2022-01-25.
How severe is CVE-2021-46483?: High severity. CVSS v3 base score is 7.8 out of 10.