{"id":"CVE-2026-67217","summary":"cJSON JSON Patch Non-Atomic Application Destroys Data Before Validation","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.","modified":"2026-08-12T03:51:18.748400830Z","published":"2026-07-29T13:32:04.416Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67217.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-696"]},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/davegamble/cjson","events":[{"introduced":"0"},{"last_affected":"c859b25da02955fef659d658b8f324b5cde87be3"}],"database_specific":{"source":["AFFECTED_FIELD","CPE_RANGE"],"cpe":"cpe:2.3:a:davegamble:cjson:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"1.7.19"}]}}],"versions":["v1.7.19","v1.7.18","v1.7.17","v1.7.16","v1.7.15","v1.7.14","v1.7.13","v1.7.12","v1.7.11","v1.7.10","v1.7.9","v1.7.8","v1.7.7","v1.7.6","v1.7.5","v1.7.4","v1.7.3","v1.7.2","v1.7.1","v1.7.0","v1.6.0","v1.5.9","v1.5.8","v1.5.7","v1.5.6","v1.5.5","v1.5.4","v1.5.3","v1.5.2","v1.5.1","v1.5.0","v1.4.7","v1.4.6","v1.4.5","v1.4.4","v1.4.3","v1.4.2","v1.4.1","v1.4.0","v1.3.2","v1.3.1","v1.3.0","v1.2.1","v1.2.0","v1.1.0","v1.0.2","v1.0.1","v1.0.0","v0.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67217.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","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"}]}