======================================================================== CVE-2026-19954 CPAN Security Group ========================================================================
CVE ID: CVE-2026-19954 Distribution: Net-Whois-Raw Versions: before 2.99044 MetaCPAN: https://metacpan.org/dist/Net-Whois-Raw VCS Repo: https://github.com/regru/Net-Whois-Raw 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 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. 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. Problem types ------------- - CWE-176 Improper Handling of Unicode Encoding Workarounds ----------- Apply the patch. For 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. References ---------- https://metacpan.org/release/NALOBIN/Net-Whois-Raw-2.99044/changes https://security.metacpan.org/patches/N/Net-Whois-Raw/2.99043/CVE-2026-19954-r1.patch https://github.com/regru/Net-Whois-Raw/issues/34 https://github.com/regru/Net-Whois-Raw/pull/35 https://metacpan.org/release/PJCJ/Net-IDN-Encode-2.590-TRIAL/view/lib/Net/IDN/Punycode.pm#WARNING https://www.rfc-editor.org/rfc/rfc5891#section-5.2
