Medium 6.5Published Jun 4, 2026

CVE-2026-49940Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks

Updated under an hour ago (Oct 26, 2026, 10:30 PM ET)

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It affects RRWO Net::CIDR::Set and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for RRWO Net::CIDR::Set

Exploited in the last 30 days

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.

CVSS: 6.5 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness (CWE): CWE-1289
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: CPANSec
NVD analysis: Analyzed
Record last updated: Jun 4, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

RRWO Net::CIDR::Set rrwo:net_cidr_set (from the name)	through 0.20	CNA record
rrwo net::cidr::set rrwo:net::cidr::set	before 0.21	NVD

References

References

https://metacpan.org/release/RRWO/Net-CIDR-Set-0.21/changes	release-notes
https://nvd.nist.gov/vuln/detail/CVE-2025-40911	related, third-party-advisory, us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.