CVE-2026-19566: Net::CIDR::Set 0 to before 0.23

CVE-2026-19566. CVSS 3.1 base score 7.5 (HIGH, Source advisory). EPSS 0.0063 (percentile 0.49531), scored 22-Oct-2026.

Affected technology

Net::CIDR::Set · 0 to before 0.23
RRWO

Description’s affected range: versions before 0.23 for Perl

Component: Not specified by the source
Function: Net::CIDR::Set::IPv6::_encode, Net::CIDR::Set::IPv6::_width2bits
File: lib/Net/CIDR/Set/IPv6.pm, lib/Net/CIDR/Set.pm

Attack conditions (Source advisory, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

Source advisory’s CVSS 3.1 assessment (base score 7.5/10) rates confidentiality and integrity impact as none; availability impact as high. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 24-Oct-2026 01:43 UTC

CWE: CWE-789, CWE-1284
CCR priority: 30.2 /100 (P4)
CVSS 3.1: 7.5 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · Source advisory
EPSS: 0.0063 · percentile 0.49531 · 2026-10-22
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-24 01:40:49.068977+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-19566.html