What is CVE-2022-45493?

CVE-2022-45493 is a high-severity vulnerability in Json.h Project, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2023-02-03.

How severe is CVE-2022-45493?

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

Buffer overflow in Json.h Project

CVE-2022-45493

Buffer overflow vulnerability in function json_parse_key in sheredom json.h before commit 0825301a07cbf51653882bf2b153cc81fdadf41 (November 14, 2022) allows attackers to code arbitrary code and gain escalated privileges.

Vulnerability class: Buffer Overflow

Published 2023-02-03 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.002 (8.0th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Json.h Project

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/hyrathon/trophies/security/advisories/GHSA-r2mm-2f4c-6243 (Third Party Advisory)

Frequently asked questions

What is CVE-2022-45493?: CVE-2022-45493 is a high-severity vulnerability in Json.h Project, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2023-02-03.
How severe is CVE-2022-45493?: High severity. CVSS v3 base score is 7.8 out of 10.