CVE-2026-82803: armink struct2json JSON Deserialization s2jdef.h S2J_STRUCT_GET_string_ELEMENT null pointer dereference

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-31 · updated 2026-09-02
Weakness: CWE-404

Description

A vulnerability has been found in armink struct2json 1.0. This affects the function S2J_STRUCT_GET_string_ELEMENT in the library struct2json/inc/s2jdef.h of the component JSON Deserialization. The manipulation of the argument valuestring leads to null pointer dereference. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products

armink struct2json: 1.0

References

https://github.com/fa1c4/security-advisories/tree/main/struct2json
https://github.com/fa1c4/security-advisories/tree/main/struct2json/PoC
https://vuldb.com/cve/CVE-2026-82803
https://vuldb.com/submit/858192
https://vuldb.com/vuln/397224
https://vuldb.com/vuln/397224/cti

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