Buffer overflow vulnerability in function json_parse_value in sheredom json.h before commit 0825301a07cbf51653882bf2b153cc81fdadf41 (Novemb…

published 2023-02-03 3y ago modified 2026-06-17 4mo ago also EUVD-2022-48357

cvss: 7.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 18%
public exploits: 0; none known

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

Patch / fix

fixed in 1

json.h_project json.h 2022-11-14

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CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: last yr. (2025-03-26)

Exploit prediction

0.26% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Classification

Weakness

CWE-787 Out-of-bounds Write
CWE-122 Heap-based Buffer Overflow

References

github.com /sheredom/json.h/issues/94
third-party-advisory
github.com /hyrathon/trophies/security/advisories/GHSA-55fm-gm4m-3v3j
third-party-advisory

Sources

CVE List CVE-2022-45491
NVD CVE-2022-45491

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