{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.24"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "f5a20ecc59bdf23c4104a55e7f01a8c7729b7fc5"
            },
            {
              "fixed": "24e2c439ec405e5256024b9acefd4f7008c5ed0c"
            }
          ],
          "repo": "https://github.com/stigtsp/net-cidr-lite",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "CPANSec",
    "cwe_ids": [
      "CWE-1289"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45191.json"
  },
  "details": "Net::CIDR::Lite versions before 0.24 for Perl does not properly consider extraneous zero characters in CIDR mask values, which may allow IP ACL bypass.\n\nMask forms like \"/00\" and \"/01\" pass validation and parse to the same prefix as their unpadded value.\n\nSee also CVE-2026-45190.",
  "id": "CVE-2026-45191",
  "modified": "2026-07-15T01:48:56.116956691Z",
  "published": "2026-05-10T20:15:53.897Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://cpan.org/modules"
    },
    {
      "type": "WEB",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-45190"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45191.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://metacpan.org/release/STIGTSP/Net-CIDR-Lite-0.24/changes"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45191"
    },
    {
      "type": "FIX",
      "url": "https://github.com/stigtsp/Net-CIDR-Lite/commit/24e2c439ec405e5256024b9acefd4f7008c5ed0c.patch"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/stigtsp/Net-CIDR-Lite"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Net::CIDR::Lite versions before 0.24 for Perl does not properly consider extraneous zero characters in CIDR mask values, which may allow IP ACL bypass"
}