CVE-2026-67217
MEDIUM
MEDIUM
Priority: 0.03
BB Relevance:
74/100
Published: 2026-07-29
Modified: 2026-10-23
First seen: 2026-10-29
Status: active
Attack Surface
Network
Low Complexity
No Auth
No Interaction
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
None
S:
X
AT:
None
VC:
None
VI:
Low
VA:
None
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.
Weakness Classification (1)
Affected Software (1)
| Vendor | Product | Version |
|---|---|---|
| davegamble | cjson | < 1.7.19 |
References & Advisories (3)
Third Party Advisory
Patch
Exploit
Press/Media Coverage
Third Party Advisory