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CVE-2026-50526 is an improper link-resolution-before-file-access vulnerability in .NET's SDK container image build process, affecting the Microsoft.NET.Build.Containers package in .NET 8, 9, and 10. A local authorized attacker can exploit link following to inject resources into a container-image build, causing malicious content to be incorporated into images built by other users on the same machine.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
32 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A .NET improper-link-resolution vulnerability enabling local tampering.
A .NET improper-link-resolution vulnerability that permits local tampering.
A .NET vulnerability allowing local tampering through improper link resolution.
A .NET local tampering vulnerability caused by improper link resolution.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.