CVE-2026-82803 armink struct2json JSON Deserialization s2jdef.h S2J_STRUCT_GET_string_ELEMENT null pointer dereference
Remote attackers can cause a denial of service via null pointer dereference in the struct2json library's JSON deserialization function.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-82803?
CVE-2026-82803 is a medium-severity vulnerability in armink struct2json, published on 31 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-82803?
How do I fix CVE-2026-82803?
No fix has been published for CVE-2026-82803 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-82803 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-82803 exists.
Sources
Also known as GHSA-hqqg-x2jw-ggpc.