Vulnerability-Lookup

GHSA-456R-QJR2-XPH9

Vulnerability from github – Published: 2026-09-07 21:30 – Updated: 2026-09-08 21:33

Details

Net::IP::LPM versions before 1.12 for Perl accept malformed prefix lengths.

Non-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.

The 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.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-86287"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-07T19:17:28Z",
    "severity": "HIGH"
  },
  "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": "GHSA-456r-qjr2-xph9",
  "modified": "2026-09-08T21:33:08Z",
  "published": "2026-09-07T21:30:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-86287"
    },
    {
      "type": "WEB",
      "url": "https://github.com/robrwo/perl-Net-IP-LPM/commit/814f8baa85537827db8c3b3d251e48db7aca318f.patch"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/RRWO/Net-IP-LPM-1.12/changes"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/09/07/1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-86287 (GCVE-0-2026-86287)

Vulnerability from cvelistv5 – Published: 2026-09-07 18:25 – Updated: 2026-09-08 18:40

Title

Net::IP::LPM versions before 1.12 for Perl accept malformed prefix lengths

Summary

Net::IP::LPM versions before 1.12 for Perl accept malformed prefix lengths. Non-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. The 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.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-08 18:40 UTC

CWE

CWE-1287 - Improper Validation of Specified Type of Input

Assigner

CPANSec CNA under the redhat root

CNA scorecard C 64/100 over 273 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/robrwo/perl-Net-IP-LPM/commit/…	patch
https://metacpan.org/release/RRWO/Net-IP-LPM-1.12…	release-notes
http://www.openwall.com/lists/oss-security/2026/09/07/1

Impacted products

1 product

Vendor	Product	Version
		Affected: 0 , < 1.12 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-09-07T20:07:31.385Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/09/07/1"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-86287",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-08T18:40:16.712696Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-08T18:40:45.091Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "modules": [
            "Net::IP::LPM"
          ],
          "packageName": "Net-IP-LPM",
          "packageURL": "pkg:cpan/Net-IP-LPM",
          "programFiles": [
            "lib/Net/IP/LPM.pm",
            "LPM.xs",
            "lpm_lib.c",
            "lpm_lib.h"
          ],
          "programRoutines": [
            {
              "name": "Net::IP::LPM::add"
            },
            {
              "name": "lpm_add_raw"
            }
          ],
          "repo": "https://github.com/robrwo/perl-Net-IP-LPM",
          "versions": [
            {
              "lessThan": "1.12",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1287",
              "description": "CWE-1287 Improper Validation of Specified Type of Input",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-07T18:25:37.140Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/robrwo/perl-Net-IP-LPM/commit/814f8baa85537827db8c3b3d251e48db7aca318f.patch"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/RRWO/Net-IP-LPM-1.12/changes"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to Net::IP::LPM version 1.12 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Net::IP::LPM versions before 1.12 for Perl accept malformed prefix lengths",
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-86287",
    "datePublished": "2026-09-07T18:25:37.140Z",
    "dateReserved": "2026-09-06T14:31:43.537Z",
    "dateUpdated": "2026-09-08T18:40:45.091Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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