Medium
libnet-cidr-set-perl — security advisory
Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks. Unicode digits such as the Arabic-Indic One (U+0661) were accepted but not properly parsed as numbers. This could allow network masks to accept larger networks.
- Products
- libnet-cidr-set-perl
- Affected versions
- 0.13-2, 0.13-3, 0.13-4, 0.13-5, 0.15-1, 0.19-1, 0.20-1, 0.21-1, 0.22-1, 0.23-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-49940
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:26 UTC · Revision 1
Source evidence
Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks. Unicode digits such as the Arabic-Indic One (U+0661) were accepted but not properly parsed as numbers. This could allow network masks to accept larger networks.
osv:UBUNTU-CVE-2026-49940
libnet-cidr-set-perl
Fixed versions: Not specified
libnet-cidr-set-perl
Fixed versions: Not specified
libnet-cidr-set-perl
Fixed versions: Not specified
libnet-cidr-set-perl
Fixed versions: Not specified
libnet-cidr-set-perl
Fixed versions: Not specified
libnet-cidr-set-perl
Fixed versions: Not specified
Complete source record
{
"id": "eac06a9cd31efb5b4ea0bd712ebfdbda23ca1a91fb63fbe07ee8a3d1a5e9616a",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-49940",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-49940",
"summary": "Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks. Unicode digits such as the Arabic-Indic One (U+0661) were accepted but not properly parsed as numbers. This could allow network masks to accept larger networks.",
"evidence": "osv:UBUNTU-CVE-2026-49940",
"products": [
{
"name": {
"value": "libnet-cidr-set-perl",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.13-2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "libnet-cidr-set-perl",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.13-3",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "libnet-cidr-set-perl",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.13-4",
"evidence": "/affected/2/versions"
},
{
"value": "0.13-5",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "libnet-cidr-set-perl",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.13-5",
"evidence": "/affected/3/versions"
},
{
"value": "0.15-1",
"evidence": "/affected/3/versions"
},
{
"value": "0.19-1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "libnet-cidr-set-perl",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.19-1",
"evidence": "/affected/4/versions"
},
{
"value": "0.20-1",
"evidence": "/affected/4/versions"
},
{
"value": "0.21-1",
"evidence": "/affected/4/versions"
},
{
"value": "0.22-1",
"evidence": "/affected/4/versions"
},
{
"value": "0.23-1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "libnet-cidr-set-perl",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.19-1",
"evidence": "/affected/5/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-49940",
"aliases": [
"UBUNTU-CVE-2026-49940"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libnet-cidr-set-perl",
"purl": "pkg:deb/ubuntu/libnet-cidr-set-perl?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"0.13-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49940.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnet-cidr-set-perl",
"binary_version": "0.13-2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libnet-cidr-set-perl",
"purl": "pkg:deb/ubuntu/libnet-cidr-set-perl?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"0.13-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49940.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnet-cidr-set-perl",
"binary_version": "0.13-3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libnet-cidr-set-perl",
"purl": "pkg:deb/ubuntu/libnet-cidr-set-perl?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"0.13-4",
"0.13-5"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49940.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnet-cidr-set-perl",
"binary_version": "0.13-5"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libnet-cidr-set-perl",
"purl": "pkg:deb/ubuntu/libnet-cidr-set-perl?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"0.13-5",
"0.15-1",
"0.19-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49940.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnet-cidr-set-perl",
"binary_version": "0.19-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libnet-cidr-set-perl",
"purl": "pkg:deb/ubuntu/libnet-cidr-set-perl?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"0.19-1",
"0.20-1",
"0.21-1",
"0.22-1",
"0.23-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49940.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnet-cidr-set-perl",
"binary_version": "0.23-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libnet-cidr-set-perl",
"purl": "pkg:deb/ubuntu/libnet-cidr-set-perl?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"0.19-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49940.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnet-cidr-set-perl",
"binary_version": "0.19-1"
}
]
}
}
],
"modified": "2026-10-17T12:58:32.724109166Z",
"provider": "osv",
"upstream": [
"CVE-2026-49940"
],
"references": [
"https://ubuntu.com/security/CVE-2026-49940",
"https://www.cve.org/CVERecord?id=CVE-2026-49940",
"https://github.com/robrwo/perl-Net-CIDR-Set/commit/875010b4217afe9a61cee519f0e0250847ecf699"
]
},
"related_cves": [
{
"value": "CVE-2026-49940",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 358732,
"published_at": "2026-06-04T17:16:00+00:00"
}