zserge jsmn example/jsondump.c dump buffer overflow

Summaryinfo

A vulnerability, which was classified as critical, was found in zserge jsmn. The impacted element is the function dump of the file example/jsondump.c. Such manipulation leads to buffer overflow. This vulnerability is referenced as CVE-2026-88369. It is possible to launch the attack remotely. No exploit is available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in zserge jsmn (affected version not known) and classified as critical. Affected by this issue is the function dump of the file example/jsondump.c. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality, integrity, and availability. CVE summarizes:

zserge jsmn commit 25647e6 is vulnerable to Buffer Overflow in example/jsondump.c dump().

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-88369 since 09/10/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

Applying the patch 25647e6 is able to eliminate this problem.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• zserge

Name

• jsmn

Website

• Product: https://github.com/zserge/jsmn/

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Once again VulDB remains the best source for vulnerability data.

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