MediumFix available
libmojolicious-perl — security advisory
Mojo::JSON versions before 9.47 for Perl allow memory exhaustion via unbounded recursion in the pure-Perl decoder. The pure-Perl decode path (`_decode_value` dispatching to `_decode_array` and `_decode_object`) recurses with no depth limit, so a small deeply nested JSON document can consume excessive memory. This path is the default when Cpanel::JSON::XS is not installed or `MOJO_NO_JSON_XS=1` is set; the Cpanel::JSON::XS fast path is not affected. Any caller that decodes an untrusted JSON body, for example `Mojo::Message::json` reached through `$c->req->json`, can exhaust process memory and cause denial of service.
- Products
- libmojolicious-perl
- Affected versions
- 9.31+dfsg-1, 9.33+dfsg-1, 9.34+dfsg-1, 9.35+dfsg-1, 9.36+dfsg-1, 9.36+dfsg-1~bpo12+2, 9.37+dfsg-1, 9.37+dfsg-2, 9.37+dfsg-2~bpo12+1, 9.38+dfsg-1, 9.39+dfsg-1, 9.42+dfsg-1, 9.42+dfsg-1~bpo13+2, 9.45+dfsg-1, 9.45+dfsg-2, 9.46+dfsg-1, 9.47+dfsg-1, 9.48+dfsg-1, 9.49+dfsg-1
- Fixed versions
- 9.47+dfsg-1
- CVEs
- CVE-2026-14803
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 13:59 UTC · Revision 2
Source evidence
Mojo::JSON versions before 9.47 for Perl allow memory exhaustion via unbounded recursion in the pure-Perl decoder. The pure-Perl decode path (`_decode_value` dispatching to `_decode_array` and `_decode_object`) recurses with no depth limit, so a small deeply nested JSON document can consume excessive memory. This path is the default when Cpanel::JSON::XS is not installed or `MOJO_NO_JSON_XS=1` is set; the Cpanel::JSON::XS fast path is not affected. Any caller that decodes an untrusted JSON body, for example `Mojo::Message::json` reached through `$c->req->json`, can exhaust process memory and cause denial of service.
osv:DEBIAN-CVE-2026-14803
libmojolicious-perl
Fixed versions: Not specified
libmojolicious-perl
Fixed versions: Not specified
libmojolicious-perl
Fixed versions: 9.47+dfsg-1
Complete source record
{
"id": "0a783a1f26f02cf6e8771915d7a22c269ff4810cb8976dfc27395569e8f8c03f",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-14803",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-14803",
"summary": "Mojo::JSON versions before 9.47 for Perl allow memory exhaustion via unbounded recursion in the pure-Perl decoder. The pure-Perl decode path (`_decode_value` dispatching to `_decode_array` and `_decode_object`) recurses with no depth limit, so a small deeply nested JSON document can consume excessive memory. This path is the default when Cpanel::JSON::XS is not installed or `MOJO_NO_JSON_XS=1` is set; the Cpanel::JSON::XS fast path is not affected. Any caller that decodes an untrusted JSON body, for example `Mojo::Message::json` reached through `$c->req->json`, can exhaust process memory and cause denial of service.",
"evidence": "osv:DEBIAN-CVE-2026-14803",
"products": [
{
"name": {
"value": "libmojolicious-perl",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "9.31+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "9.33+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "9.34+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "9.35+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "9.36+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "9.36+dfsg-1~bpo12+2",
"evidence": "/affected/0/versions"
},
{
"value": "9.37+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "9.37+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "9.37+dfsg-2~bpo12+1",
"evidence": "/affected/0/versions"
},
{
"value": "9.38+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "9.39+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "9.42+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "9.42+dfsg-1~bpo13+2",
"evidence": "/affected/0/versions"
},
{
"value": "9.45+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "9.45+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "9.46+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "9.47+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "9.48+dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "9.49+dfsg-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "libmojolicious-perl",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "9.39+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "9.42+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "9.42+dfsg-1~bpo13+2",
"evidence": "/affected/1/versions"
},
{
"value": "9.45+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "9.45+dfsg-2",
"evidence": "/affected/1/versions"
},
{
"value": "9.46+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "9.47+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "9.48+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "9.49+dfsg-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "libmojolicious-perl",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "9.47+dfsg-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "9.39+dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "9.42+dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "9.42+dfsg-1~bpo13+2",
"evidence": "/affected/2/versions"
},
{
"value": "9.45+dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "9.45+dfsg-2",
"evidence": "/affected/2/versions"
},
{
"value": "9.46+dfsg-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-14803",
"aliases": [
"DEBIAN-CVE-2026-14803"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libmojolicious-perl",
"purl": "pkg:deb/debian/libmojolicious-perl?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"9.31+dfsg-1",
"9.33+dfsg-1",
"9.34+dfsg-1",
"9.35+dfsg-1",
"9.36+dfsg-1",
"9.36+dfsg-1~bpo12+2",
"9.37+dfsg-1",
"9.37+dfsg-2",
"9.37+dfsg-2~bpo12+1",
"9.38+dfsg-1",
"9.39+dfsg-1",
"9.42+dfsg-1",
"9.42+dfsg-1~bpo13+2",
"9.45+dfsg-1",
"9.45+dfsg-2",
"9.46+dfsg-1",
"9.47+dfsg-1",
"9.48+dfsg-1",
"9.49+dfsg-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-14803.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libmojolicious-perl",
"purl": "pkg:deb/debian/libmojolicious-perl?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"9.39+dfsg-1",
"9.42+dfsg-1",
"9.42+dfsg-1~bpo13+2",
"9.45+dfsg-1",
"9.45+dfsg-2",
"9.46+dfsg-1",
"9.47+dfsg-1",
"9.48+dfsg-1",
"9.49+dfsg-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-14803.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "9.47+dfsg-1"
}
]
}
],
"package": {
"name": "libmojolicious-perl",
"purl": "pkg:deb/debian/libmojolicious-perl?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"9.39+dfsg-1",
"9.42+dfsg-1",
"9.42+dfsg-1~bpo13+2",
"9.45+dfsg-1",
"9.45+dfsg-2",
"9.46+dfsg-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-14803.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-26T12:02:56.834999231Z",
"provider": "osv",
"upstream": [
"CVE-2026-14803"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-14803"
]
},
"related_cves": [
{
"value": "CVE-2026-14803",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 453012,
"published_at": "2026-07-06T02:16:21.683+00:00"
}