tar filter allows writing outside destination via empty-named symlink
CVE-2026-114583
Summary
Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information.
If impact to additional products is identified, we will update the CVE to reflect this.
Products covered
azl3 python-py 1.11.0-1 on Azure Linux 3.0
azl3 python3 3.12.9-5 on Azure Linux 3.0
cbl2 python3 3.9.19-16 on CBL Mariner 2.0
azl3 python3 3.12.9-4 on Azure Linux 3.0
cbl2 python3 3.9.19-14 on CBL Mariner 2.0
cbl2 python3 3.9.19-15 on CBL Mariner 2.0
Remediation
Release Notes CBL-Mariner Releases
Vendor-listed fixes
3.12.9-5
3.9.19-16
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.