CVE-2026-67217
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3v1.7.19, v1.7.18, v1.7.17, …+ 2 more
- (no CPE)range: v1.7.19, v1.7.18, v1.7.17, …
- cpe:2.3:a:davegamble:cjson:*:*:*:*:*:*:*:*range: <=1.7.19
- (no CPE)range: <=1.7.19
Patches
Vulnerability mechanics
References
3- github.com/DaveGamble/cJSON/blob/v1.7.19/cJSON_Utils.cnvdPatch
- joshua.hu/cjson-json-parser-cve-vulnerabilitiesnvdExploitPress/Media CoverageThird Party Advisory
- www.vulncheck.com/advisories/cjson-json-patch-non-atomic-application-destroys-data-before-validationnvdThird Party Advisory
News mentions
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