{"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":"none","cwe":["CWE-176"],"product":"Net-Whois-Raw","affected":["Net-Whois-Raw < 2.99044"],"published":"2026-10-05","updated":"2026-10-05","sourceUpdated":"2026-10-05T07:16:30.820","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"}],"tags":["nvd","cve.org"],"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":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}