URI versions before 5.36 for Perl encode non-NFC host names to non-standard punycode labels via missing normalization in nameprep

• azl3 perl-URI 5.21-2 on Azure Linux 3.0

• azl3 perl-URI 5.21-3 on Azure Linux 3.0

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

1. Oct 2, 2026 at 12:40 PM UTC
   • The vendor changed the advisory's last-updated date.
2. Sep 27, 2026 at 11:11 PM UTC
   • Added affected products: azl3 perl-URI 5.21-3 on Azure Linux 3.0.
   • Added fixed versions: 5.21-3.
   • The vendor changed its remediation guidance.

1. Sep 3, 2026 at 1:09 AM UTC
   Published by Microsoft Security Response Center

   The publication date reported by the vendor.

2. Sep 4, 2026 at 11:50 AM UTC
   Added to SecurityAlert

   We collected the advisory from the official source.

3. Oct 2, 2026 at 1:50 AM UTC
   Updated by Microsoft Security Response Center

   The vendor changed the advisory after it was first published.

4. Oct 28, 2026 at 3:45 AM UTC
   Confirmed at the source

   Our collector saw this advisory during a later source check.