CVE-2026-82803Public exploitNetwork attack vector

Service crash via unchecked JSON string copy

Published Aug 31, 2026 · Updated Sep 2, 2026

NULL pointer dereference in Armink struct2json 1.0 allows remote attackers to crash a consuming service via crafted JSON input. S2J_STRUCT_GET_string_ELEMENT passes a parsed node's NULL valuestring to strncpy without first confirming that the node is a JSON string. No authentication or user interaction is required when a consuming service exposes deserialization to network input; the bounded result is a process crash.

CVSS severityUnavailable
Unscored
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

NULL pointer dereference in Armink struct2json 1.0 allows remote attackers to crash a consuming service via crafted JSON input. S2J_STRUCT_GET_string_ELEMENT passes a parsed node's NULL valuestring to strncpy without first confirming that the node is a JSON string. No authentication or user interaction is required when a consuming service exposes deserialization to network input; the bounded result is a process crash.

The record

CVE
CVE-2026-82803
Published
Aug 31, 2026
Updated
Sep 2, 2026
Vendor
Armink
Product
struct2json
Classifications
CWE-404, CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Armink · struct2jsonversion=1.0

Published CVSS scores

5.0VulDBAV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:ND/RC:UR
5.3VulDBCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
6.9VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
5.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-404Improper Resource Shutdown or Release
CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo