{"id":"CVE-2026-19954","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.\n\npwhois encodes each non-ASCII label directly using Net::IDN::Punycode and prepends xn--","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.\n\npwhois encodes each non-ASCII label directly using Net::IDN::Punycode and prepends xn--. …","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","cwe":["CWE-176"],"product":"Net-Whois-Raw","affected":["Net-Whois-Raw < 2.99044"],"published":"2026-10-05","updated":"2026-10-06","sourceUpdated":"2026-10-06T18:16:53.823","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-19954","references":[{"url":"https://github.com/regru/Net-Whois-Raw/issues/34","label":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://github.com/regru/Net-Whois-Raw/pull/35","label":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://metacpan.org/release/NALOBIN/Net-Whois-Raw-2.99044/changes","label":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://metacpan.org/release/PJCJ/Net-IDN-Encode-2.590-TRIAL/view/lib/Net/IDN/Punycode.pm#WARNING","label":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://security.metacpan.org/patches/N/Net-Whois-Raw/2.99043/CVE-2026-19954-r1.patch","label":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://www.rfc-editor.org/rfc/rfc5891#section-5.2","label":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"http://www.openwall.com/lists/oss-security/2026/10/05/9","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd","cve.org"],"epss":0.00229,"epssPercentile":0.1368,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-06T17:52:04.047979Z"},"ingestedAt":"2026-10-05T07:14:48.252Z","slug":"CVE-2026-19954","body":"## Overview\n\nNet::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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":216625,"id":"CVE-2026-19954","ts":1791310374900,"field":"cvss","old":null,"new":"5.4"},{"seq":216624,"id":"CVE-2026-19954","ts":1791310374900,"field":"severity","old":"none","new":"medium"}]}