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

7.3 / 10

HIGH

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

Description

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.

Basic Information

ID CVE-2026-49942

Source CPANSec

Published Jun 4, 2026 at 16:07

Modified Jun 4, 2026 at 17:45

Affected Product

Vendor RRWO

Product Net::CIDR::Set

Affected Versions RRWO Net::CIDR::Set 0

CWE Classification

CWE-1289

References

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    "lastseen": "",
    "description": "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.",
    "published": "2026-06-04T16:07:42.179Z",
    "modified": "2026-06-04T17:45:48.065Z",
    "type": "cve",
    "title": "Net::CIDR::Set versions through 0.20 for Perl did not validate network masks",
    "source": "CPANSec",
    "references": "https://metacpan.org/release/RRWO/Net-CIDR-Set-0.21/changes\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40911\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-45191",
    "id": "CVE-2026-49942",
    "bulletinFamily": "",
    "cwe": [
        "CWE-1289"
    ],
    "cvelist": null,
    "sourceData": "RRWO Net::CIDR::Set 0",
    "sourceHref": "",
    "cvss": {
        "score": 7.3,
        "severity": "HIGH",
        "vector": "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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        "cvssV3": {
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    "href": "",
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    "product": "Net::CIDR::Set",
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}

Net::CIDR::Set versions through 0.20 for Perl did not validate network masks_CVE-2026-49942