CVE-2026-87933 DaveGamble cJSON - Use After Free

DaveGamble cJSON <= 1.7.19 contains a use after free vulnerability caused by improper handling in cJSONUtils_MergePatch function in cJSON_Utils.c, letting remote attackers cause memory corruption, exploit requires crafted input.

CVSS base score 7.3 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.53% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Use After Free
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Published
10 September 2026
Updated
15 October 2026
Weakness
CWE-119

Vendor fix

Update to the latest version with the fix applied once the pull request is accepted.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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