{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:davegamble:cjson:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "1.7.19"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "CPE_RANGE"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "c859b25da02955fef659d658b8f324b5cde87be3"
            }
          ],
          "repo": "https://github.com/davegamble/cjson",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-696"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67217.json"
  },
  "details": "cJSON through 1.7.19 applies RFC 6902 JSON Patch operations non-atomically in apply_patch() in cJSON_Utils.c. For a replace operation that is missing its value member, or a move operation whose destination path cannot be resolved, the existing target member is detached and deleted before the operation is fully validated, so the target document is mutated while cJSONUtils_ApplyPatches() or cJSONUtils_ApplyPatchesCaseSensitive() returns a failure status. An attacker who can supply the patch document can destroy addressable members of the target document even though the API reports that the patch failed, defeating the all-or-nothing behavior callers rely on to reject bad patches.",
  "id": "CVE-2026-67217",
  "modified": "2026-08-12T03:51:18.748400830Z",
  "published": "2026-07-29T13:32:04.416Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67217.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-67217"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/cjson-json-patch-non-atomic-application-destroys-data-before-validation"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/DaveGamble/cJSON/blob/v1.7.19/cJSON_Utils.c#L887-L948"
    },
    {
      "type": "EVIDENCE",
      "url": "https://joshua.hu/cjson-json-parser-cve-vulnerabilities"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "cJSON JSON Patch Non-Atomic Application Destroys Data Before Validation"
}