Vulnerability-Lookup

CVE-2026-49942 (GCVE-0-2026-49942)

Vulnerability from cvelistv5 – Published: 2026-06-04 16:07 – Updated: 2026-06-04 17:45

Title

Net::CIDR::Set versions through 0.20 for Perl did not validate network masks

Summary

Net::CIDR::Set versions through 0.20 for Perl did not validate network masks. The mask portion of a network mask could contain Unicode digits such as the Arabic-Indic One (U+0661), or non-digits, which were ignored. This could allow network masks to accept larger networks. Leading zeros were also accepted, but treated as decimal instead of octal. This could lead to confusion about what networks are acceptable.

Severity

7.3 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-1289 - Improper Validation of Unsafe Equivalence in Input

Assigner

CPANSec

References

3 references

URL	Tags
https://metacpan.org/release/RRWO/Net-CIDR-Set-0.…	release-notes
https://nvd.nist.gov/vuln/detail/CVE-2025-40911	related
https://nvd.nist.gov/vuln/detail/CVE-2026-45191	related

Impacted products

1 product

Vendor	Product	Version
RRWO	Net::CIDR::Set	Affected: 0 , ≤ 0.20 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 7.3,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "LOW",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
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                "options": [
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                    "Exploitation": "none"
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      }
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          "defaultStatus": "unaffected",
          "packageName": "Net-CIDR-Set",
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          "programRoutines": [
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          "vendor": "RRWO",
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        }
      ],
      "problemTypes": [
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          "descriptions": [
            {
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              "description": "CWE-1289 Improper Validation of Unsafe Equivalence in Input",
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            }
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        "dateUpdated": "2026-06-04T16:07:42.179Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/RRWO/Net-CIDR-Set-0.21/changes"
        },
        {
          "tags": [
            "related"
          ],
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40911"
        },
        {
          "tags": [
            "related"
          ],
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45191"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to version 0.21."
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      ],
      "source": {
        "discovery": "UNKNOWN"
      },
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          "time": "2026-05-13T00:00:00.000Z",
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        },
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          "lang": "en",
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    "assignerShortName": "CPANSec",
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    "datePublished": "2026-06-04T16:07:42.179Z",
    "dateReserved": "2026-06-02T16:06:23.069Z",
    "dateUpdated": "2026-06-04T17:45:48.065Z",
    "state": "PUBLISHED"
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      "date": "2026-08-04",
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      "status": "final",
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      "version": "2"
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}

FKIE_CVE-2026-49942

Vulnerability from fkie_nvd - Published: 2026-06-04 17:16 - Updated: 2026-07-22 20:10

Severity

7.3 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Summary

References

URL	Tags
9b29abf9-4ab0-4765-b253-1875cd9b441e	https://metacpan.org/release/RRWO/Net-CIDR-Set-0.21/changes	Release Notes
9b29abf9-4ab0-4765-b253-1875cd9b441e	https://nvd.nist.gov/vuln/detail/CVE-2025-40911	Third Party Advisory, US Government Resource
9b29abf9-4ab0-4765-b253-1875cd9b441e	https://nvd.nist.gov/vuln/detail/CVE-2026-45191	Third Party Advisory, US Government Resource

Impacted products

	Vendor	Product	Version
	rrwo	net\	\

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Net-CIDR-Set",
          "product": "Net::CIDR::Set",
          "programRoutines": [
            {
              "name": "Net::CIDR::Set::IPv4::_encode"
            },
            {
              "name": "Net::CIDR::Set::IPv6::_encode"
            }
          ],
          "repo": "https://github.com/robrwo/perl-Net-CIDR-Set",
          "vendor": "RRWO",
          "versions": [
            {
              "lessThanOrEqual": "0.20",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:rrwo:net\\:\\:cidr\\:\\:set:*:*:*:*:*:perl:*:*",
              "matchCriteriaId": "24C7BD24-8729-408F-BD1D-F8F0608DFE50",
              "versionEndExcluding": "0.21",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Net::CIDR::Set versions through 0.20 for Perl did not validate network masks.\n\nThe mask portion of a network mask could contain Unicode digits such as the Arabic-Indic One (U+0661), or non-digits, which were ignored.   This could allow network masks to accept larger networks.\n\nLeading zeros were also accepted, but treated as decimal instead of octal.  This could lead to confusion about what networks are acceptable."
    },
    {
      "lang": "es",
      "value": "Las versiones de Net::CIDR::Set hasta la 0.20 para Perl no validaban las m\u00e1scaras de red.\n\nLa porci\u00f3n de m\u00e1scara de una m\u00e1scara de red pod\u00eda contener d\u00edgitos Unicode como el Uno ar\u00e1bigo-\u00edndico (U+0661), o no-d\u00edgitos, los cuales eran ignorados. Esto podr\u00eda permitir a las m\u00e1scaras de red aceptar redes m\u00e1s grandes.\n\nLos ceros iniciales tambi\u00e9n eran aceptados, pero tratados como decimal en lugar de octal. Esto podr\u00eda llevar a confusi\u00f3n sobre qu\u00e9 redes son aceptables."
    }
  ],
  "id": "CVE-2026-49942",
  "lastModified": "2026-07-22T20:10:00.127",
  "metrics": {
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          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
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          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
          "version": "3.1"
        },
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        "impactScore": 3.4,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
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    ],
    "ssvcV203": [
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          "options": [
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              "exploitation": "none"
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            }
          ],
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          "version": "2.0.3"
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  "references": [
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      "tags": [
        "Release Notes"
      ],
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    },
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
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      ],
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    },
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      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
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  "vulnStatus": "Analyzed",
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          "value": "CWE-1289"
        }
      ],
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      "type": "Secondary"
    }
  ]
}

GHSA-FFF7-GX98-VR3G

Vulnerability from github – Published: 2026-06-04 18:30 – Updated: 2026-06-04 21:31

Details

Net::CIDR::Set versions through 0.20 for Perl did not validate network masks.

The mask portion of a network mask could contain Unicode digits such as the Arabic-Indic One (U+0661), or non-digits, which were ignored. This could allow network masks to accept larger networks.

Leading zeros were also accepted, but treated as decimal instead of octal. This could lead to confusion about what networks are acceptable.

Severity

7.3 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-49942"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1289"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-04T17:16:33Z",
    "severity": "HIGH"
  },
  "details": "Net::CIDR::Set versions through 0.20 for Perl did not validate network masks.\n\nThe mask portion of a network mask could contain Unicode digits such as the Arabic-Indic One (U+0661), or non-digits, which were ignored.   This could allow network masks to accept larger networks.\n\nLeading zeros were also accepted, but treated as decimal instead of octal.  This could lead to confusion about what networks are acceptable.",
  "id": "GHSA-fff7-gx98-vr3g",
  "modified": "2026-06-04T21:31:21Z",
  "published": "2026-06-04T18:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40911"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45191"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-49942"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/RRWO/Net-CIDR-Set-0.21/changes"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ]
}

ubuntu-cve-2026-49942

Vulnerability from osv_ubuntu

Published

2026-06-04 17:16

Modified

2026-06-11 13:06

Summary

Details

Severity

7.3 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-49942	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-49942	REPORT
	https://github.com/robrwo/perl-Net-CIDR-Set/commi…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnet-cidr-set-perl",
            "binary_version": "0.13-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libnet-cidr-set-perl",
        "purl": "pkg:deb/ubuntu/libnet-cidr-set-perl@0.13-2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.13-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnet-cidr-set-perl",
            "binary_version": "0.13-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libnet-cidr-set-perl",
        "purl": "pkg:deb/ubuntu/libnet-cidr-set-perl@0.13-3?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.13-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnet-cidr-set-perl",
            "binary_version": "0.13-5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libnet-cidr-set-perl",
        "purl": "pkg:deb/ubuntu/libnet-cidr-set-perl@0.13-5?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.13-4",
        "0.13-5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnet-cidr-set-perl",
            "binary_version": "0.19-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "libnet-cidr-set-perl",
        "purl": "pkg:deb/ubuntu/libnet-cidr-set-perl@0.19-1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.13-5",
        "0.15-1",
        "0.19-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnet-cidr-set-perl",
            "binary_version": "0.19-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "libnet-cidr-set-perl",
        "purl": "pkg:deb/ubuntu/libnet-cidr-set-perl@0.19-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.19-1"
      ]
    }
  ],
  "aliases": [],
  "details": "Net::CIDR::Set versions through 0.20 for Perl did not validate network masks. The mask portion of a network mask could contain Unicode digits such as the Arabic-Indic One (U+0661), or non-digits, which were ignored.   This could allow network masks to accept larger networks. Leading zeros were also accepted, but treated as decimal instead of octal. This could lead to confusion about what networks are acceptable.",
  "id": "UBUNTU-CVE-2026-49942",
  "modified": "2026-06-11T13:06:30Z",
  "published": "2026-06-04T17:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-49942"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-49942"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/robrwo/perl-Net-CIDR-Set/commit/875010b4217afe9a61cee519f0e0250847ecf699"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-49942"
  ]
}

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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

CVE-2026-49942 (GCVE-0-2026-49942)

FKIE_CVE-2026-49942

GHSA-FFF7-GX98-VR3G

ubuntu-cve-2026-49942

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature