Null Pointer Dereference in Armink Struct2json JSON Deserialization Library
CVE-2026-82803

6.9MEDIUM

Key Information:

Vendor

Armink

Status
Struct2json
Vendor
CVE Published:
31 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-82803?

A vulnerability exists in the Armink Struct2json library in version 1.0, specifically in the function S2J_STRUCT_GET_string_ELEMENT located in the header file s2jdef.h, which is responsible for JSON deserialization. This flaw arises from the manipulation of the argument valuestring, leading to a null pointer dereference that can be exploited remotely. This type of vulnerability could allow an attacker to cause application crashes or execute arbitrary code if exploited successfully. The vendor was alerted about this issue prior to public disclosure, but no response was received.

Affected Version(s)

struct2json 1.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-82803 - Proof of Concept

References

https://vuldb.com/vuln/397224
vdb-entrytechnical-description
https://vuldb.com/vuln/397224/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-82803
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

fa1c4 (VulDB User)
VulDB CNA Team
.