{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.12"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "77cb686c281c60af48aaaea95d3c660f68e7d718"
            },
            {
              "fixed": "814f8baa85537827db8c3b3d251e48db7aca318f"
            }
          ],
          "repo": "https://github.com/robrwo/perl-net-ip-lpm",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "CPANSec",
    "cwe_ids": [
      "CWE-1287"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86287.json"
  },
  "details": "Net::IP::LPM versions before 1.12 for Perl accept malformed prefix lengths.\n\nNon-numeric and non-ASCII prefix lengths are accepted and treated as 0. Integers over 31 bits are silently truncated.  A single malformed mask will poison the lookup table.\n\nThe result is that the lookup will silently succeed for every address. An allow-list will allow every address, and a deny-list will block every address.",
  "id": "CVE-2026-86287",
  "modified": "2026-09-10T03:30:52.743753483Z",
  "published": "2026-09-07T18:25:37.140Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/09/07/1"
    },
    {
      "type": "WEB",
      "url": "https://cpan.org/modules"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86287.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://metacpan.org/release/RRWO/Net-IP-LPM-1.12/changes"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-86287"
    },
    {
      "type": "FIX",
      "url": "https://github.com/robrwo/perl-Net-IP-LPM/commit/814f8baa85537827db8c3b3d251e48db7aca318f.patch"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/robrwo/perl-Net-IP-LPM"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Net::IP::LPM versions before 1.12 for Perl accept malformed prefix lengths"
}