CVE-2026-87933

High

Description

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.

SeverityHigh

CVSS7.3

Exploit probability—

ProductDavegamble Cjson

PublishedSep 10, 2026

First seenSep 10, 2026

Weakness typeCWE-416Use after free CWE-119Memory buffer bounds error

How to fix

Patches

github.com/DaveGamble/cJSON/pull/1065

Affected products

Product	Affected versions	Fixed in
davegamble cjson	1.7.0, 1.7.1, 1.7.2, 1.7.3, 1.7.4, 1.7.5, 1.7.6, 1.7.7, 1.7.8, 1.7.9, 1.7.10, 1.7.11, 1.7.12, 1.7.13, 1.7.14, 1.7.15, 1.7.16, 1.7.17, 1.7.18, 1.7.19	—

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