CVE-2026-87933

5.5 mediumEPSS 0.5%

Medium (5.5). EPSS 0.5% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

5.5 medium

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

CVSS 3.1

7.3 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 44% of CVEs (scores of 2026-10-31)
CWEs: CWE-119, CWE-416
Published: 2026-09-10
Modified: 2026-09-10
Record from: the NVD, synced 2026-10-19

References

https://github.com/DaveGamble/cJSON/
https://github.com/DaveGamble/cJSON/issues/1060
https://github.com/DaveGamble/cJSON/pull/1065
https://vuldb.com/cve/CVE-2026-87933
https://vuldb.com/submit/911136

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