CVE-2026-49942 Affecting libnet-cidr-set-perl package, versions <0.15-1+deb13u1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-DEBIAN13-LIBNETCIDRSETPERL-17139953
- published4 Jun 2026
- disclosed4 Jun 2026
Introduced: 4 Jun 2026
CVE-2026-49942 (opens in a new tab)How to fix?
Upgrade Debian:13 libnet-cidr-set-perl to version 0.15-1+deb13u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libnet-cidr-set-perl package and not the libnet-cidr-set-perl package as distributed by Debian.
See How to fix? for Debian:13 relevant fixed versions and status.
Net::CIDR::Set versions through 0.20 for Perl did not validate network masks.
The mask portion of a network mask could contain Unicode digits such as the Arabic-Indic One (U+0661), or non-digits, which were ignored. This could allow network masks to accept larger networks.
Leading zeros were also accepted, but treated as decimal instead of octal. This could lead to confusion about what networks are acceptable.