CVE Watch29 jul 2026

CVE-2026-67216

cJSON through 1.7.19 contains an inefficient algorithmic complexity flaw in cJSON_Compare(). When comparing objects, the function recurses i

CVSS

5.9

Medio

EPSS

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KEV

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Exploit Today

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0-100

Publicado: 29 jul 2026 · Última mod.: 29 jul 2026 · CWE-407

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

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.

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