{"id":"CVE-2026-19954","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-19954","generatedAt":"2026-10-27T23:56:45.524Z","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. pwhois encodes each non-ASCII label directly using Net::IDN::Punycode and prepends xn--.","description":"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.\n\npwhois 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\".\n\nThe Net::Whois::Raw library modules are not affected.","published":"2026-10-05T07:16:31.000Z","lastModified":"2026-10-06T18:16:54.000Z","status":"Deferred","sourceIdentifier":"9b29abf9-4ab0-4765-b253-1875cd9b441e","cvss":{"version":"3.1","score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N"},"cwe":["CWE-176"],"affected":[],"epss":{"score":0.00229,"percentile":0.13633,"date":"2026-10-26","history":[{"date":"2026-10-05","score":0.00179,"percentile":0.0677}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.23%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-10-06T19:30:04.000Z","detail":{"from":null,"score":"5.4","severity":"MEDIUM","fromSeverity":null},"summary":"Now scored CVSS 5.4 MEDIUM."},{"kind":"new","label":"New CVE","at":"2026-10-05T07:16:31.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-05T07:16:30.820Z"},"summary":"New CVE, medium severity (CVSS 5.4)."}],"references":[{"url":"https://github.com/regru/Net-Whois-Raw/issues/34","source":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://github.com/regru/Net-Whois-Raw/pull/35","source":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://metacpan.org/release/NALOBIN/Net-Whois-Raw-2.99044/changes","source":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://metacpan.org/release/PJCJ/Net-IDN-Encode-2.590-TRIAL/view/lib/Net/IDN/Punycode.pm#WARNING","source":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://security.metacpan.org/patches/N/Net-Whois-Raw/2.99043/CVE-2026-19954-r1.patch","source":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://www.rfc-editor.org/rfc/rfc5891#section-5.2","source":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"http://www.openwall.com/lists/oss-security/2026/10/05/9","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-19954","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}