What’s Vulnerable › Vulnerabilities

CVE-2023-53154

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-05-23 · updated 2026-06-17
• Weakness: CWE-125

Description

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

How to fix

Upgrade to a fixed version: cJSON project cJSON 1.7.18. Check the vendor advisory for mitigations.

References

• https://github.com/DaveGamble/cJSON/compare/v1.7.17...v1.7.18
• https://github.com/DaveGamble/cJSON/issues/800
• https://lists.debian.org/debian-lts-announce/2025/06/msg00014.html
• https://github.com/DaveGamble/cJSON/issues/800

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