---
id: CVE-2026-87933
title: >-
  cJSON: cJSON: Memory corruption via use after free in cJSONUtils_MergePatch
  (CVE-2026-87933)
summary: >-
  A flaw was found in DaveGamble cJSON. The `cJSONUtils_MergePatch` function in
  `cJSON_Utils.c` is vulnerable to a use-after-free error. A remote attacker
  could exploit this memory corruption vulnerability, potentially leading to
  information…
severity: high
cvss: 8.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L'
cvssSource: vendor
cwe:
  - CWE-825
  - CWE-416
  - CWE-119
vendor: Red Hat
product: Red Hat Satellite 6
affected:
  - satellite 6
published: '2026-09-10'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T11:59:02+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-87933.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-87933.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-87933'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2531215'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-87933'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-87933'
  - url: 'https://github.com/DaveGamble/cJSON/'
  - url: 'https://github.com/DaveGamble/cJSON/issues/1060'
  - url: 'https://github.com/DaveGamble/cJSON/pull/1065'
  - url: 'https://vuldb.com/cve/CVE-2026-87933'
  - url: 'https://vuldb.com/submit/911136'
  - url: 'https://vuldb.com/vuln/401815'
  - url: 'https://vuldb.com/vuln/401815/cti'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - exploit-available
epss: 0.00527
epssPercentile: 0.42147
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-10T17:51:16.285890Z'
scores:
  vendor: 8.6
  cna: 7.3
ingestedAt: '2026-09-11T16:45:48.025Z'
---

## Overview

A flaw was found in DaveGamble cJSON. The `cJSONUtils_MergePatch` function in `cJSON_Utils.c` is vulnerable to a use-after-free error. A remote attacker could exploit this memory corruption vulnerability, potentially leading to information disclosure, data corruption, or denial of service.

## Vendor advisories

- **Red Hat VEX** · Important · affected: Red Hat Satellite 6 · no fix planned: Red Hat Satellite 6 · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-87933.json)

**cJSON: cJSON: Memory corruption via use after free in cJSONUtils_MergePatch** — rated Important by Red Hat. Released 2026-09-10, updated 2026-09-14.

Affected:

- Red Hat Satellite 6

No fix planned:

- Red Hat Satellite 6

Not affected:

- Red Hat Hardened Images

## Remediation

Affected