NULL pointer dereference in Armink Struct2json
CVE-2026-82803
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.007 (52.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.007 · change: +0.003
Affected products
- Armink Struct2json — versions 1.0
Weakness classification (CWE)
References
- vuldb.com/vuln/397224 (technical-description, vdb-entry)
- vuldb.com/vuln/397224/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-82803 (third-party-advisory)
- vuldb.com/submit/858192 (third-party-advisory)
- github.com/fa1c4/security-advisories/tree/main/struct2json (related)
- github.com/fa1c4/security-advisories/tree/main/struct2json/PoC (exploit)
Frequently asked questions
- What is CVE-2026-82803?
- CVE-2026-82803 is a medium-severity vulnerability in Armink Struct2json, classified under Improper Resource Shutdown or Release. CVSS score: 5.3/10. Published 2026-08-31.
- How severe is CVE-2026-82803?
- Medium severity. CVSS v3 base score is 5.3 out of 10.