CVE-2026-67216

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-67216
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67216.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-67216
Downstream
Published
2026-07-29T13:32:03.696Z
Modified
2026-07-30T04:03:21.768609286Z
Severity
  • 8.2 (High) CVSS_V4 - 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 CVSS Calculator
Summary
cJSON cJSON_Compare Exponential Complexity Denial of Service
Details

cJSON through 1.7.19 contains an inefficient algorithmic complexity flaw in cJSONCompare(). When comparing objects, the function recurses into each shared subtree twice, once in each direction, with no depth guard, making the running time exponential in nesting depth. A small, deeply nested document of a few hundred bytes (depth around 40) compared for equality consumes hours of CPU, and the cost roughly doubles with each additional level of nesting. An application that calls cJSONCompare() on attacker-influenced JSON that is structurally equal to a reference document is exposed to a denial-of-service condition.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67216.json",
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-407"
    ]
}
References

Affected packages

Git / github.com/davegamble/cjson

Affected ranges

Type
GIT
Repo
https://github.com/davegamble/cjson
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
c859b25da02955fef659d658b8f324b5cde87be3
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "1.7.19"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

v0.*
v0.0.0
v1.*
v1.0.0
v1.0.1
v1.0.2
v1.1.0
v1.2.0
v1.2.1
v1.3.0
v1.3.1
v1.3.2
v1.4.0
v1.4.1
v1.4.2
v1.4.3
v1.4.4
v1.4.5
v1.4.6
v1.4.7
v1.5.0
v1.5.1
v1.5.2
v1.5.3
v1.5.4
v1.5.5
v1.5.6
v1.5.7
v1.5.8
v1.5.9
v1.6.0
v1.7.0
v1.7.1
v1.7.10
v1.7.11
v1.7.12
v1.7.13
v1.7.14
v1.7.15
v1.7.16
v1.7.17
v1.7.18
v1.7.19
v1.7.2
v1.7.3
v1.7.4
v1.7.5
v1.7.6
v1.7.7
v1.7.8
v1.7.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67216.json"