CVE-2026-19954 (GCVE-0-2026-19954)

Vulnerability from cvelistv5 – Published: 2026-10-05 06:54 – Updated: 2026-10-05 06:54
VLAI
Title
Net::Whois::Raw versions before 2.99044 for Perl ship a pwhois command-line tool that queries WHOIS for the wrong domain for unicode domain names
Summary
Net::Whois::Raw versions before 2.99044 for Perl ship a pwhois command-line tool that queries WHOIS for the wrong domain for unicode domain names. pwhois encodes each non-ASCII label directly using Net::IDN::Punycode and prepends xn--. Apart from lowercasing ASCII and Cyrillic letters, it skips the IDNA mapping and normalization steps, so a label with other uppercase letters, or not in NFC, encodes to a different A-label than its IDNA form. For example, a label of U+00C9 followed by "cole" encodes to "xn--cole-pka" rather than "xn--cole-9oa". The Net::Whois::Raw library modules are not affected.
Severity
No CVSS data available.
CWE
  • CWE-176 - Improper Handling of Unicode Encoding
Assigner
References
Impacted products
Vendor Product Version CPE status
Affected: 0 , < 2.99044 (custom)
Show details on NVD website
To clipboard 

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          "programFiles": [
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          "programRoutines": [
            {
              "name": "to_punycode"
            }
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          "repo": "https://github.com/regru/Net-Whois-Raw",
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        }
      ],
      "problemTypes": [
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              "description": "CWE-176 Improper Handling of Unicode Encoding",
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        "dateUpdated": "2026-10-05T06:54:09.352Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
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        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/NALOBIN/Net-Whois-Raw-2.99044/changes"
        },
        {
          "tags": [
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          "url": "https://security.metacpan.org/patches/N/Net-Whois-Raw/2.99043/CVE-2026-19954-r1.patch"
        },
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          "url": "https://github.com/regru/Net-Whois-Raw/issues/34"
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          "url": "https://github.com/regru/Net-Whois-Raw/pull/35"
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          "tags": [
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          "url": "https://www.rfc-editor.org/rfc/rfc5891#section-5.2"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Net::Whois::Raw versions before 2.99044 for Perl ship a pwhois command-line tool that queries WHOIS for the wrong domain for unicode domain names",
      "workarounds": [
        {
          "lang": "en",
          "value": "Apply the patch.\n\nFor deployments that cannot apply the patch, convert the domain name to its A-label form, for example with Net::IDN::Encode::domain_to_ascii, before passing it to pwhois. pwhois passes all-ASCII names through unchanged."
        }
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    "cveId": "CVE-2026-19954",
    "datePublished": "2026-10-05T06:54:09.352Z",
    "dateReserved": "2026-08-15T21:45:07.158Z",
    "dateUpdated": "2026-10-05T06:54:09.352Z",
    "state": "PUBLISHED"
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      "date": "2026-10-05",
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        "metrics": {},
        "published": "2026-10-05T07:16:30.820",
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}



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