PT-2026-65814 · Dave Gamble · Cjson

CVE-2026-67216 · Publicado 2026-07-29 · Atualizado 2026-07-29

NVD

CVSS v3.1

5.9

Média

Vetor base

AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Exploit

Correção

Enumeração de Fraquezas

CWE-407

Identificadores relacionados

CVE-2026-67216

Produtos afetados

Cjson

Referências · 4

• 🔥 https://joshua.hu/cjson-json-parser-cve-vulnerabilities · Exploit
• https://github.com/DaveGamble/cJSON/blob/v1.7.19/cJSON.c#L3057-L3180 · Nota
• https://vulncheck.com/advisories/cjson-cjson-compare-exponential-complexity-denial-of-service · Nota
• https://nvd.nist.gov/vuln/detail/CVE-2026-67216 · Nota de Segurança