Disclosure summary
URI versions before 5.36 for Perl encode non-NFC host names to non-standard punycode labels via missing normalization in nameprep
Source-reported weakness categories
CWE-1289
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
Microsoft Security Updates (CVRF) · 2026-Aug
Open original source · Updated Oct 01, 2026
URI versions before 5.36 for Perl encode non-NFC host names to non-standard punycode labels via missing normalization in nameprep
Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.
Microsoft maximum product score: 6.5
| Vendor | Product / association | Version / bounds |
|---|---|---|
| Microsoft update guide | azl3 perl-URI 5.21-2 on Azure Linux 3.0 | (MSRC status code 3) |
| Microsoft update guide | azl3 perl-URI 5.21-3 on Azure Linux 3.0 | (MSRC status code 3) |
Vendor remediation references
- Vendor guidance · build 5.21-3 · product IDs 21781-17084
- Vendor guidance · product IDs 21781-17084
- Release Notes · build 5.21-3 · product IDs 21919-17084
- Vendor guidance · product IDs 21919-17084
Original records & references
- NIST NVD record
- CVE Program record
- msrc.microsoft.com — Vendor advisory
PUBLISHED 2026-09-02T21:09:27-04:00
MODIFIED 2026-10-01T21:50:31-04:00
INGESTED 2026-10-08T12:35:08-04:00