undici vulnerable to cookie attribute injection via unsanitized domain and unparsed setCookie fields
CVE-2026-16729
Summary
Improper link resolution before file access ('link following') in Windows Subsystem for Linux allows an authorized attacker to elevate privileges locally.
Products covered
Windows Subsystem for Linux (WSL2)
Remediation
Release Notes
Vendor-listed fixes
3.0.1
CVEs in this advisory 1
Update history
What changed in later vendor updates
SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.
- The vendor changed the advisory title.
- The vendor changed the advisory summary.
- Added affected products: Windows Subsystem for Linux (WSL2).
- Removed affected products: Microsoft Defender for Endpoint for Linux.
- Added fixed versions: 3.0.1.
- The vendor changed its remediation guidance.
Updates
- Published by Microsoft Security Response Center
The publication date reported by the vendor.
- Added to SecurityAlert
We collected the advisory from the official source.
- Updated by Microsoft Security Response Center
The vendor changed the advisory after it was first published.
- Confirmed at the source
Our collector saw this advisory during a later source check.