CVE-2026-49941

Summary

Net::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 addresses did not look like netmasks or network ranges, then they were assumed to single IP addresses and passed back to itself as a 32-bit or 128-bit netmask.

If the argument was not a well-formed IP address, then this would lead to indefinite recursion.

An attacker could use this to cause a denial of service.

Affected Software

Weaknesses

• CWE-1287: CWE-1287 Improper Validation of Specified Type of Input
• CWE-674: CWE-674 Uncontrolled Recursion

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

• http://www.openwall.com/lists/oss-security/2026/06/04/11

References

• https://metacpan.org/release/RRWO/Net-CIDR-Set-0.21/changes

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