CVE-2026-87933

DaveGamble cJSON cJSON_Utils.c cJSONUtils_MergePatch use after free

HIGH
7.3
CVSS Score
Published: September 10, 2026 at 12:15 AM UTC
Updated: September 10, 2026 at 08:17 PM UTC
1 product affected across 1 vendorcJSON

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Severity
HIGH7.3
Exploit prediction
EPSS 0.5%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (7)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/vuln/401815
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/401815/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2026-87933
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/911136
ExploitIssue Tracking
Source: cverecord
https://github.com/DaveGamble/cJSON/issues/1060
Issue TrackingPatch
Source: cverecord
https://github.com/DaveGamble/cJSON/pull/1065
Product
Source: cverecord
https://github.com/DaveGamble/cJSON/

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.3HIGHVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-416CWE-119

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