Vulnerability Details CVE-2026-67217
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 14.2%
CVSS Severity
CVSS v3 Score 5.3
References
Products affected by CVE-2026-67217
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cpe:2.3:a:davegamble:cjson:0.0.0
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cpe:2.3:a:davegamble:cjson:1.0.0
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cpe:2.3:a:davegamble:cjson:1.0.1
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cpe:2.3:a:davegamble:cjson:1.0.2
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cpe:2.3:a:davegamble:cjson:1.1.0
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cpe:2.3:a:davegamble:cjson:1.2.0
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cpe:2.3:a:davegamble:cjson:1.2.1
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cpe:2.3:a:davegamble:cjson:1.3.0
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cpe:2.3:a:davegamble:cjson:1.3.1
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cpe:2.3:a:davegamble:cjson:1.3.2
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cpe:2.3:a:davegamble:cjson:1.4.0
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cpe:2.3:a:davegamble:cjson:1.4.1
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cpe:2.3:a:davegamble:cjson:1.4.2
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cpe:2.3:a:davegamble:cjson:1.4.3
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cpe:2.3:a:davegamble:cjson:1.4.4
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cpe:2.3:a:davegamble:cjson:1.4.5
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cpe:2.3:a:davegamble:cjson:1.4.6
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cpe:2.3:a:davegamble:cjson:1.4.7
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cpe:2.3:a:davegamble:cjson:1.5.0
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cpe:2.3:a:davegamble:cjson:1.5.1
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cpe:2.3:a:davegamble:cjson:1.5.2
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cpe:2.3:a:davegamble:cjson:1.5.3
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cpe:2.3:a:davegamble:cjson:1.5.4
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cpe:2.3:a:davegamble:cjson:1.5.5
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cpe:2.3:a:davegamble:cjson:1.5.6
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cpe:2.3:a:davegamble:cjson:1.5.7
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cpe:2.3:a:davegamble:cjson:1.5.8
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cpe:2.3:a:davegamble:cjson:1.5.9
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cpe:2.3:a:davegamble:cjson:1.6.0
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cpe:2.3:a:davegamble:cjson:1.7.0
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cpe:2.3:a:davegamble:cjson:1.7.1
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cpe:2.3:a:davegamble:cjson:1.7.10
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cpe:2.3:a:davegamble:cjson:1.7.11
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cpe:2.3:a:davegamble:cjson:1.7.12
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cpe:2.3:a:davegamble:cjson:1.7.13
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cpe:2.3:a:davegamble:cjson:1.7.14
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cpe:2.3:a:davegamble:cjson:1.7.15
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cpe:2.3:a:davegamble:cjson:1.7.16
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cpe:2.3:a:davegamble:cjson:1.7.17
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cpe:2.3:a:davegamble:cjson:1.7.18
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cpe:2.3:a:davegamble:cjson:1.7.2
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cpe:2.3:a:davegamble:cjson:1.7.3
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cpe:2.3:a:davegamble:cjson:1.7.4
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cpe:2.3:a:davegamble:cjson:1.7.5
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cpe:2.3:a:davegamble:cjson:1.7.6
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cpe:2.3:a:davegamble:cjson:1.7.7
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cpe:2.3:a:davegamble:cjson:1.7.8
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cpe:2.3:a:davegamble:cjson:1.7.9