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CVE-2026-40199 Net::CIDR::Lite versions before 0.23 for Perl mishandles IPv4 mapped IPv6 addresses, which may allow IP ACL bypass

🗓️ 10 Apr 2026 21:49:48Reported by CPANSecType 
cvelist
 cvelist
🔗 www.cve.org👁 17 Views

Net::CIDR::Lite before 0.23 mishandles IPv4 mapped IPv6 addresses, enabling IP ACL bypass.

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Affected
Refs
[
  {
    "collectionURL": "https://cpan.org/modules",
    "defaultStatus": "unaffected",
    "packageName": "Net-CIDR-Lite",
    "product": "Net::CIDR::Lite",
    "programFiles": [
      "Lite.pm"
    ],
    "programRoutines": [
      {
        "name": "Net::CIDR::Lite::_pack_ipv6"
      }
    ],
    "repo": "https://github.com/stigtsp/Net-CIDR-Lite",
    "vendor": "STIGTSP",
    "versions": [
      {
        "lessThan": "0.23",
        "status": "affected",
        "version": "0",
        "versionType": "custom"
      }
    ]
  }
]

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