CVE-2026-67216

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.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• 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

0.64% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 50.7% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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

Analyzed. NVD last modified this record on 2026-10-23.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

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

2026-07-29 13:32Z3 MO AGO

Last updated

2026-07-30 15:19Z3 MO AGO

Reserved

2026-07-28

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

High (CVSS 8.2)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Weaknesses

• CWE-407Inefficient Algorithmic ComplexityClass
• CWE-770Allocation of Resources Without Limits or ThrottlingBase

Data version

5.2

Document digest

bcd23fb994201c7c6c8a29cd6e7318f1c69c019d3b8e7d2d3b0d64fbac155e7b

• joshua.huSecurity vulnerabilities in the cJSON JSON parser (Joshua Rogers)https://joshua.hu/cjson-json-parser-cve-vulnerabilitiesexploit
• github.comcJSON_Compare double-recursion object comparison (cJSON.c)https://github.com/DaveGamble/cJSON/blob/v1.7.19/cJSON.c#L3057-L3180technical-description
• www.vulncheck.comVulnCheck Advisory: cJSON cJSON_Compare Exponential Complexity Denial of Servicehttps://www.vulncheck.com/advisories/cjson-cjson-compare-exponential-complexity-denial-of-servicethird-party-advisory