Bug 2545817 (CVE-2026-19954) - CVE-2026-19954 perl-net-whois-raw: perl-net-whois-raw: incorrect WHOIS domain lookup via improper Unicode normalization
Summary: CVE-2026-19954 perl-net-whois-raw: perl-net-whois-raw: incorrect WHOIS domain...
Keywords:
Status: NEW
Alias: CVE-2026-19954
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2546315
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-05 07:07 UTC by OSIDB Bzimport
Modified: 2026-10-06 08:02 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-10-05 07:07:21 UTC 
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.
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