Buffer overflow in Davegamble Cjson
CVE-2026-87933
A vulnerability was found in DaveGamble cJSON up to 1.7.19. The affected element is the function cJSONUtils_MergePatch of the file cJSON_Utils.c. The manipulation results in use after free. The attack may be launched remotely. The exploit has been made public and could be used. The pull request to fix this issue awaits acceptance.
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Davegamble Cjson — versions 1.7.0, 1.7.1, 1.7.10
Weakness classification (CWE)
References
- cna@vuldb.com (technical-description, vdb-entry)
- cna@vuldb.com (signature, permissions-required)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (issue-tracking, exploit)
- cna@vuldb.com (issue-tracking, patch)
- cna@vuldb.com (product)
Frequently asked questions
- What is CVE-2026-87933?
- CVE-2026-87933 is a high-severity vulnerability in Davegamble Cjson, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.3/10. Published 2026-09-10.
- How severe is CVE-2026-87933?
- High severity. CVSS v3 base score is 7.3 out of 10.