CVE-2023-53154: Cjson Project Cjson

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

parse_string in cJSON before 1.7.18 has a heap-based buffer over-read via {"1":1, with no trailing newline if cJSON_ParseWithLength is called.

Affected products

• Cjson Project Cjson: before 1.7.18 (fixed in 1.7.18)

Published 2025-05-23. Last modified 2026-06-17.