CVE-2026-87933— DaveGamble cJSON cJSON_Utils.c cJSONUtils_MergePatch use after free
Quick assessment
Affected
DaveGamble cJSON
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 DaveGamble 的 cJSON 库（版本 1.7.19 及以下）中发现了一个漏洞。受影响的组件是 文件中的 函数。该漏洞属于“释放后使用”（Use After Free, UAF）类型，且可被远程攻击者利用。利用该漏洞的 PoC（概念验证代码）已经公开，存在被实际利用的风险。目前，修复该问题的 Pull Request 已提交，正等待合并/接受。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-87933
Vulnerability Information
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Vulnerability Title
DaveGamble cJSON cJSON_Utils.c cJSONUtils_MergePatch use after free
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| DaveGamble | cJSON | 1.7.0 |
cpe:2.3:a:davegamble:cjson:*:*:*:*:*:*:*:*
|
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II. Public POCs for CVE-2026-87933
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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No public POC found.
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Patches & Fixes for CVE-2026-87933 (1)
Proof of Concept for CVE-2026-87933 (1)
Vendor Pages for CVE-2026-87933 (1)
IV. Related Vulnerabilities
Same product: cJSON
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CVE-2026-29036
cJSON 1.7.19 Wrong-Key Modification via JSON Pointer Escape -
CVE-2026-67216
cJSON cJSON_Compare Exponential Complexity Denial of Service -
CVE-2026-67217
cJSON JSON Patch Non-Atomic Application Destroys Data Before -
CVE-2026-67215
cJSON JSON Patch copy/add Uncontrolled Recursion Stack Exhau -
CVE-2026-16554
Integer Overflow Leading to Heap Buffer Overflow in cJSON
Same vendor: DaveGamble
-
CVE-2026-29036
cJSON 1.7.19 Wrong-Key Modification via JSON Pointer Escape -
CVE-2026-67216
cJSON cJSON_Compare Exponential Complexity Denial of Service -
CVE-2026-67217
cJSON JSON Patch Non-Atomic Application Destroys Data Before -
CVE-2026-67215
cJSON JSON Patch copy/add Uncontrolled Recursion Stack Exhau -
CVE-2026-16554
Integer Overflow Leading to Heap Buffer Overflow in cJSON
Same weakness: CWE-416
-
CVE-2026-87877
zstd-jni 1.3.8-4 through 1.5.7-13 Use-After-Free via Setters -
CVE-2026-87825
zstd-jni 1.3.8-4 through 1.5.7-13 Use-After-Free of Compress -
CVE-2026-87617
Chrome 153.0.8010.36 DevTools 释放后使用漏洞 -
CVE-2026-87448
Chrome 153.0.8010.36 DevTools 释放后使用漏洞 -
CVE-2026-87634
Chrome 153.0.8010.36前WebPackaging释放后使用漏洞
V. Comments for CVE-2026-87933
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