CVE-2026-29036
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.
Matched ports (1)
| Port | Package | Version | Status | Maintainer |
|---|---|---|---|---|
| devel/libcjson | libcjson | 1.7.19_1 | unaddressed | sunpoet@FreeBSD.org |
Template for a VuXML entry
Range taken from the CVE record, check it before committing. make newentry in security/vuxml creates the vid.
<vuln vid="FIXME (make newentry)">
<topic>FIXME -- FIXME</topic>
<affects>
<package>
<name>libcjson</name>
<range><lt>FIXME</lt></range>
</package>
</affects>
<description>
<body xmlns="http://www.w3.org/1999/xhtml">
<p>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.</p>
</body>
</description>
<references>
<cvename>CVE-2026-29036</cvename>
<url>https://nvd.nist.gov/vuln/detail/CVE-2026-29036</url>
</references>
<dates>
<discovery>2026-08-11</discovery>
<entry>2026-10-26</entry>
</dates>
</vuln>