High
cjson — security advisory
cJSON through 1.7.19 is vulnerable to uncontrolled recursion leading to stack exhaustion when an untrusted RFC 6902 JSON Patch is applied via cJSONUtils_ApplyPatches() or cJSONUtils_ApplyPatchesCaseSensitive(). A patch containing add and copy operations grafts duplicated subtrees to amplify document depth beyond the parser's nesting limit: cJSON_Delete() recurses with no depth bound, and the cJSON_Duplicate() guard CJSON_CIRCULAR_LIMIT is set to 10000, ten times the parser's 1000-level nesting limit and high enough to overflow a default thread stack. An attacker who can supply the patch document can crash the process, resulting in denial of service.
- Products
- cjson
- Affected versions
- 1.7.15-1, 1.7.15-1+deb12u1, 1.7.15-1+deb12u2, 1.7.15-1+deb12u3, 1.7.15-1+deb12u4, 1.7.16-1, 1.7.16-2, 1.7.17-1, 1.7.17-2, 1.7.18-1, 1.7.18-2, 1.7.18-3, 1.7.18-3.1, 1.7.18-3.1+deb13u1, 1.7.18-4, 1.7.19-1, 1.7.19-2
- Fixed versions
- Not specified
- CVEs
- CVE-2026-67215
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 04:05 UTC · Revision 1
Source evidence
cJSON through 1.7.19 is vulnerable to uncontrolled recursion leading to stack exhaustion when an untrusted RFC 6902 JSON Patch is applied via cJSONUtils_ApplyPatches() or cJSONUtils_ApplyPatchesCaseSensitive(). A patch containing add and copy operations grafts duplicated subtrees to amplify document depth beyond the parser's nesting limit: cJSON_Delete() recurses with no depth bound, and the cJSON_Duplicate() guard CJSON_CIRCULAR_LIMIT is set to 10000, ten times the parser's 1000-level nesting limit and high enough to overflow a default thread stack. An attacker who can supply the patch document can crash the process, resulting in denial of service.
osv:DEBIAN-CVE-2026-67215
cjson
Fixed versions: Not specified
cjson
Fixed versions: Not specified
cjson
Fixed versions: Not specified
Complete source record
{
"id": "6a632c7f51928a125ff05e9fabedea0b9cb421eb89db15470e5466e9a3edcdd7",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-67215",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-67215",
"summary": "cJSON through 1.7.19 is vulnerable to uncontrolled recursion leading to stack exhaustion when an untrusted RFC 6902 JSON Patch is applied via cJSONUtils_ApplyPatches() or cJSONUtils_ApplyPatchesCaseSensitive(). A patch containing add and copy operations grafts duplicated subtrees to amplify document depth beyond the parser's nesting limit: cJSON_Delete() recurses with no depth bound, and the cJSON_Duplicate() guard CJSON_CIRCULAR_LIMIT is set to 10000, ten times the parser's 1000-level nesting limit and high enough to overflow a default thread stack. An attacker who can supply the patch document can crash the process, resulting in denial of service.",
"evidence": "osv:DEBIAN-CVE-2026-67215",
"products": [
{
"name": {
"value": "cjson",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.7.15-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.7.15-1+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "1.7.15-1+deb12u2",
"evidence": "/affected/0/versions"
},
{
"value": "1.7.15-1+deb12u3",
"evidence": "/affected/0/versions"
},
{
"value": "1.7.15-1+deb12u4",
"evidence": "/affected/0/versions"
},
{
"value": "1.7.16-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.7.16-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.7.17-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.7.17-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.7.18-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.7.18-2",
"evidence": "/affected/0/versions"
},
{
"value": "1.7.18-3",
"evidence": "/affected/0/versions"
},
{
"value": "1.7.18-3.1",
"evidence": "/affected/0/versions"
},
{
"value": "1.7.18-4",
"evidence": "/affected/0/versions"
},
{
"value": "1.7.19-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.7.19-2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "cjson",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.7.18-3.1",
"evidence": "/affected/1/versions"
},
{
"value": "1.7.18-3.1+deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "1.7.18-4",
"evidence": "/affected/1/versions"
},
{
"value": "1.7.19-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.7.19-2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "cjson",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.7.18-3.1",
"evidence": "/affected/2/versions"
},
{
"value": "1.7.18-4",
"evidence": "/affected/2/versions"
},
{
"value": "1.7.19-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.7.19-2",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2026-67215",
"aliases": [
"DEBIAN-CVE-2026-67215"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cjson",
"purl": "pkg:deb/debian/cjson?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1.7.15-1",
"1.7.15-1+deb12u1",
"1.7.15-1+deb12u2",
"1.7.15-1+deb12u3",
"1.7.15-1+deb12u4",
"1.7.16-1",
"1.7.16-2",
"1.7.17-1",
"1.7.17-2",
"1.7.18-1",
"1.7.18-2",
"1.7.18-3",
"1.7.18-3.1",
"1.7.18-4",
"1.7.19-1",
"1.7.19-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-67215.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cjson",
"purl": "pkg:deb/debian/cjson?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.7.18-3.1",
"1.7.18-3.1+deb13u1",
"1.7.18-4",
"1.7.19-1",
"1.7.19-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-67215.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cjson",
"purl": "pkg:deb/debian/cjson?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.7.18-3.1",
"1.7.18-4",
"1.7.19-1",
"1.7.19-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-67215.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-24T09:47:28.764443922Z",
"provider": "osv",
"upstream": [
"CVE-2026-67215"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-67215"
]
},
"related_cves": [
{
"value": "CVE-2026-67215",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 428974,
"published_at": "2026-07-29T14:16:35.187+00:00"
}