{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "1.5.0"
              },
              {
                "last_affected": "1.7.19"
              },
              {
                "fixed": "1.7.19"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION"
            ]
          },
          "events": [
            {
              "introduced": "1217ca9e9f0134fe4666b3c81771af545c4c1b9d"
            },
            {
              "fixed": "c859b25da02955fef659d658b8f324b5cde87be3"
            }
          ],
          "repo": "https://github.com/davegamble/cjson",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-706"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/29xxx/CVE-2026-29036.json"
  },
  "details": "cJSON versions 1.5.0 through 1.7.19 contain an incorrectly-resolved name or reference vulnerability in the decode_pointer_inplace() function within cJSON_Utils.c that allows unauthenticated attackers to cause JSON Patch operations to target wrong object keys by supplying crafted JSON Pointer escape sequences (~0 or ~1) in patch paths. Attackers can submit malicious RFC 6902 JSON Patch input to applications using cJSONUtils_ApplyPatches() or cJSONUtils_ApplyPatchesCaseSensitive() to silently corrupt data or delete unintended keys, potentially bypassing authorization controls in applications that rely on JSON Patch for access-controlled data modification.",
  "id": "CVE-2026-29036",
  "modified": "2026-08-15T11:31:18.680675725Z",
  "published": "2026-08-11T21:30:01.779Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/29xxx/CVE-2026-29036.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-29036"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/cjson-wrong-key-modification-via-json-pointer-escape-decoding"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/DaveGamble/cJSON"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "cJSON 1.7.19 Wrong-Key Modification via JSON Pointer Escape Decoding"
}