ALPINE-CVE-2026-40198
Net::CIDR::Lite versions before 0.23 for Perl does not validate IPv6 group count, which may allow IP ACL bypass. _pack_ipv6() does not check that uncompressed IPv6 addresses (without ::) have exactly 8 hex groups. Inputs like "abcd", "1:2:3", or "1:2:3:4:5:6:7" are accepted and produce packed values of wrong length (3, 7, or 15 bytes instead of 17). The packed values are used internally for mask and comparison operations. find() and bin_find() use Perl string comparison (lt/gt) on these values, and comparing strings of different lengths gives wrong results. This can cause find() to incorrectly report an address as inside or outside a range. Example: my $cidr = Net::CIDR::Lite->new("::/8"); $cidr->find("1:2:3"); # invalid input, incorrectly returns true This is the same class of input validation issue as CVE-2021-47154 (IPv4 leading zeros) previously fixed in this module. See also CVE-2026-40199, a related issue in the same function affecting IPv4 mapped IPv6 addresses.
ALPINE-CVE-2026-40198
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:ALPINE-CVE-2026-40198
perl-net-cidr-lite
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 0.23-r0
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
perl-net-cidr-lite
Source reference: /affected/1/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 0.23-r0
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
perl-net-cidr-lite
Source reference: /affected/2/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 0.23-r0
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
perl-net-cidr-lite
Source reference: /affected/3/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 0.23-r0
Source reference:
/affected/3/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.23-r0"
}
]
}
],
"package": {
"name": "perl-net-cidr-lite",
"purl": "pkg:apk/alpine/perl-net-cidr-lite?arch=source",
"ecosystem": "Alpine:v3.21"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-40198.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.23-r0"
}
]
}
],
"package": {
"name": "perl-net-cidr-lite",
"purl": "pkg:apk/alpine/perl-net-cidr-lite?arch=source",
"ecosystem": "Alpine:v3.22"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-40198.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.23-r0"
}
]
}
],
"package": {
"name": "perl-net-cidr-lite",
"purl": "pkg:apk/alpine/perl-net-cidr-lite?arch=source",
"ecosystem": "Alpine:v3.23"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-40198.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.23-r0"
}
]
}
],
"package": {
"name": "perl-net-cidr-lite",
"purl": "pkg:apk/alpine/perl-net-cidr-lite?arch=source",
"ecosystem": "Alpine:v3.24"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-40198.json"
},
"ecosystem_specific": {}
}
]Publisher severity
No explicit severity was provided.
- Event
- #54338 · Revision 1
- Added to Heist Feed
- Publisher date