CVE-2026-49940 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.
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Test your applications- Snyk IDSNYK-DEBIAN13-LIBNETCIDRSETPERL-17139958
- published4 Jun 2026
- disclosed4 Jun 2026
Introduced: 4 Jun 2026
CVE-2026-49940 (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 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.