CVE-2026-19954 (GCVE-0-2026-19954)

Vulnerability from cvelistv5 – Published: 2026-10-05 06:54 – Updated: 2026-10-06 17:52
VLAI
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
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. 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.
Severity
5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-06 17:52 UTC
CWE
  • CWE-176 - Improper Handling of Unicode Encoding
Assigner
CPANSec CNA under the redhat root
CNA scorecard C 64/100 over 265 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Affected: 0 , < 2.99044 (custom)
Show details on NVD website
To clipboard 

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}



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