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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.

PUBLISHED Reserved 2026-06-02 | Published 2026-06-04 | Updated 2026-06-04 | Assigner CPANSec

Problem types

CWE-1289 Improper Validation of Unsafe Equivalence in Input

Product status

Default status
unaffected

Any version
affected

Timeline

2026-05-13:Issue reported to CPANSec
2026-06-02:Net::CIDR::Set version 0.21 released with fix

References

metacpan.org/release/RRWO/Net-CIDR-Set-0.21/changes release-notes

nvd.nist.gov/vuln/detail/CVE-2025-40911 related

cve.org (CVE-2026-49940)

nvd.nist.gov (CVE-2026-49940)

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