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Vulnerability record · CVE-2026-49940 · published 4 June 2026

CVE-2026-49940: Rrwo net\ vulnerability

RRrwo · Net\

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.

6.5 CVSS 3.1 Medium EPSS 0.30% · top 80.1% CWE-1289 · CWE-1289
6.5CVSS 3.1 base score
0.30%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
22 Jul 2026Last modified by NVD

Description

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://metacpan.org/release/RRWO/Net-CIDR-Set-0.21/changes Release Notes
https://nvd.nist.gov/vuln/detail/CVE-2025-40911 Third Party AdvisoryUS Government Resource

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2026-49941Rrwo net\ vulnerabilityNet::CIDR::Set versions through 0.20 for Perl did not validate IP addresses. The add method called the _encode method to parse addresses. If the addr…EPSS 0.49%7.3CVE-2026-49942Rrwo net\ vulnerabilityNet::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…EPSS 0.49%6.5CVE-2026-48710Starlette Host header validation flaw enables request.url path mismatchStarlette before 1.0.1 did not validate the HTTP Host header before using it to rebuild request.url, so a malformed Host value could make request.url…KEVEPSS 7.1%analysed

Source: NIST National Vulnerability Database (record CVE-2026-49940), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.