CVE Catalog

CVE-2026-19954

MediumCVSS 5.4
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.22%

11th percentile - higher than 11% of all known CVEs

Summary

The pwhois tool in Net::Whois::Raw before version 2.99044 for Perl queries WHOIS for the wrong domain for unicode domain names. The punycode encoding skips IDNA mapping and normalization steps, leading to incorrect A-labels for certain characters.

Risk Assessment

The organization may receive incorrect WHOIS information for domains with international characters, potentially leading to wrong decisions regarding domain security or ownership.

Recommendation

Update Net::Whois::Raw to version 2.99044 or later to ensure correct processing of unicode domain names.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS