CVE-2026-67216

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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
2026-07-29T13:32:03Z
Modified
2026-08-12T03:51:42Z
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 cJSON_Compare(). 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 cJSON_Compare() on attacker-influenced JSON that is structurally equal to a reference document is exposed to a denial-of-service condition.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-407"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67216.json"
}
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
Show details 
{
    "cpe": "cpe:2.3:a:davegamble:cjson:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "1.7.19"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ]
}

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"