undici vulnerable to cookie attribute injection via unsanitized domain and unparsed setCookie fields
CVE-2026-16729
Summary
Mariner
Products covered
azl3 python3 3.12.9-10 on Azure Linux 3.0
cbl2 python3 3.9.19-19 on CBL Mariner 2.0
azl3 python3 3.12.9-9 on Azure Linux 3.0
azl3 python-py 1.11.0-1 on Azure Linux 3.0
Remediation
CBL-Mariner Releases Release Notes
Vendor-listed fixes
3.12.9-10
3.9.19-20
CVEs in this advisory 1
Updates
- Published by Microsoft Security Response Center
The publication date reported by the vendor.
- Updated by Microsoft Security Response Center
The vendor changed the advisory after it was first published.
- Added to SecurityAlert
We collected the advisory from the official source.
- Confirmed at the source
Our collector saw this advisory during a later source check.