Vulnerability · Published Aug 31, 2026 · Assigned by VulDB
CVE-2026-82803armink struct2json JSON Deserialization s2jdef.h S2J_STRUCT_GET_string_ELEMENT null pointer dereference
Medium 5.3
In plain English
A medium-severity null pointer dereference in struct2json from armink. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities).
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| armink | struct2json | 1.0 |
Weakness: CWE-476, CWE-404 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
References
- VDB-397224 | armink struct2json JSON Deserialization s2jdef.h S2J_STRUCT_GET_string_ELEMENT null pointer dereference vdb-entry, technical-description
- VDB-397224 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- CVE-2026-82803 | CVE Analysis and Report third-party-advisory
- Submit #858192 | armink struct2json 4f1fdc9fe928b94cb2e1f23f37d18b4cd2e35bfa NULL Pointer Dereference third-party-advisory
- https://github.com/fa1c4/security-advisories/tree/main/struct2json related
- https://github.com/fa1c4/security-advisories/tree/main/struct2json/PoC exploit