CVE-2026-49940

Summary

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.

Affected Software

Weaknesses

• CWE-1289: CWE-1289 Improper Validation of Unsafe Equivalence in Input

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: partial

References

• https://metacpan.org/release/RRWO/Net-CIDR-Set-0.21/changes
• https://nvd.nist.gov/vuln/detail/CVE-2025-40911

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