{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "1.7.19"
              },
              {
                "fixed": "1.7.19"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "c859b25da02955fef659d658b8f324b5cde87be3"
            }
          ],
          "repo": "https://github.com/davegamble/cjson",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-674"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67215.json"
  },
  "details": "cJSON through 1.7.19 is vulnerable to uncontrolled recursion leading to stack exhaustion when an untrusted RFC 6902 JSON Patch is applied via cJSONUtils_ApplyPatches() or cJSONUtils_ApplyPatchesCaseSensitive(). A patch containing add and copy operations grafts duplicated subtrees to amplify document depth beyond the parser's nesting limit: cJSON_Delete() recurses with no depth bound, and the cJSON_Duplicate() guard CJSON_CIRCULAR_LIMIT is set to 10000, ten times the parser's 1000-level nesting limit and high enough to overflow a default thread stack. An attacker who can supply the patch document can crash the process, resulting in denial of service.",
  "id": "CVE-2026-67215",
  "modified": "2026-07-31T03:33:55.349398882Z",
  "published": "2026-07-29T13:32:02.975Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67215.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-67215"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/cjson-json-patch-copy-add-uncontrolled-recursion-stack-exhaustion"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/DaveGamble/cJSON/blob/v1.7.19/cJSON.c#L253-L261"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/DaveGamble/cJSON/blob/v1.7.19/cJSON_Utils.c#L906-L940"
    },
    {
      "type": "EVIDENCE",
      "url": "https://joshua.hu/cjson-json-parser-cve-vulnerabilities"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "cJSON JSON Patch copy/add Uncontrolled Recursion Stack Exhaustion"
}