CVE-2026-29036
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
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| DaveGamble | cJSON | 1.5.0 <= 1.7.19 | affected |
Weaknesses
- CWE-706: Use of Incorrectly-Resolved Name or Reference
References
- https://github.com/DaveGamble/cJSON
- https://www.vulncheck.com/advisories/cjson-wrong-key-modification-via-json-pointer-escape-decoding
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