CVE-2026-82803

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.40% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 33.7% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-09-02.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-08-31 15:30Z4 DAYS AGO

Last updated

2026-09-02 14:00Z2 DAYS AGO

Reserved

2026-08-31

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 6.9)

CNA CVSS vector

CVSS: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

Weaknesses

• CWE-404Improper Resource Shutdown or ReleaseClass
• CWE-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

3d678ee36dde5c6cb72470d6d58541ecc902582fdb9a13008f6ae4bf44db601a

• vuldb.comVDB-397224 | armink struct2json JSON Deserialization s2jdef.h S2J_STRUCT_GET_string_ELEMENT null pointer dereferencehttps://vuldb.com/vuln/397224vdb-entrytechnical-description
• vuldb.comVDB-397224 | CTI Indicators (IOB, IOC, IOA)https://vuldb.com/vuln/397224/ctisignaturepermissions-required
• vuldb.comCVE-2026-82803 | CVE Analysis and Reporthttps://vuldb.com/cve/CVE-2026-82803third-party-advisory
• vuldb.comSubmit #858192 | armink struct2json 4f1fdc9fe928b94cb2e1f23f37d18b4cd2e35bfa NULL Pointer Dereferencehttps://vuldb.com/submit/858192third-party-advisory
• github.comhttps://github.com/fa1c4/security-advisories/tree/main/struct2jsonrelated
• github.comhttps://github.com/fa1c4/security-advisories/tree/main/struct2json/PoCexploit