CVE-2023-26819

LOW

Published Apr 19, 2025 Modified Nov 3, 2025 CWE-440

Description

cJSON 1.7.15 might allow a denial of service via a crafted JSON document such as {"a": true, "b": [ null,9999999999999999999999999999999999999999999999912345678901234567]}.

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CVSS v3.1 Score

2.9

LOW

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

Weakness Type (CWE)

CWE-440 CWE-440

Affected Products

Vendor	Product	Versions
cjson_project	cjson	All

References

Exploits

https://github.com/boofish/json_bugs/tree/main/cjson

Other References

https://lists.debian.org/debian-lts-announce/2025/06/msg00014.html

Frequently Asked Questions

What is CVE-2023-26819? +

cJSON 1.7.15 might allow a denial of service via a crafted JSON document such as {"a": true, "b": [ null,9999999999999999999999999999999999999999999999912345678901234567]}. It has a CVSS v3.1 base score of 2.9 (LOW).

How severe is CVE-2023-26819? +

CVE-2023-26819 has a CVSS v3.1 score of 2.9 out of 10, rated LOW. This is a low-severity vulnerability with limited impact.

What products are affected by CVE-2023-26819? +

CVE-2023-26819 affects products from cjson_project, specifically: cjson. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-26819? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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