CVE-2026-87933 PUBLISHED

DaveGamble cJSON cJSON_Utils.c cJSONUtils_MergePatch use after free

Assigner: VulDB
Reserved: 09.09.2026 Published: 10.09.2026 Updated: 10.09.2026

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.

CVSS Vector: 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 Score: 6.9

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	None	Availability	Low	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
CVSS Score: 7.3

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	None	Integrity Impact	Low
User Interaction	None	Availability Impact	Low

CVSS 3.1

CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
CVSS Score: 7.3

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	None	Integrity Impact	Low
User Interaction	None	Availability Impact	Low

CVSS 3.0

CVSS Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
CVSS Score: 7.5

Access Vector	Network	Confidentiality Impact	Partial
Access Complexity	Low	Integrity Impact	Partial
Authentication	None	Availability Impact	Partial

CVSS 2.0

Product Status

Vendor	DaveGamble
Product	cJSON
Versions	Version 1.7.0 is affected Version 1.7.1 is affected Version 1.7.2 is affected Version 1.7.3 is affected Version 1.7.4 is affected Version 1.7.5 is affected Version 1.7.6 is affected Version 1.7.7 is affected Version 1.7.8 is affected Version 1.7.9 is affected Version 1.7.10 is affected Version 1.7.11 is affected Version 1.7.12 is affected Version 1.7.13 is affected Version 1.7.14 is affected Version 1.7.15 is affected Version 1.7.16 is affected Version 1.7.17 is affected Version 1.7.18 is affected Version 1.7.19 is affected

CVE-2026-87933 PUBLISHED

DaveGamble cJSON cJSON_Utils.c cJSONUtils_MergePatch use after free

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Problem Types