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CVE-2026-18171 is a vulnerability in Docker Sandboxes (sbx) in which the read-only intent for a host-mounted directory is enforced only on the in-guest bind mount, while the corresponding underlying virtio-fs host-edge grant remains allowlisted without an access-mode restriction. As a result, a host directory attached to the sandbox as read-only can still remain writable through the sandbox's shared export path. Unprivileged code running inside the sandbox can derive that alternate path and use it to modify host files despite the operator having mounted the directory read-only. The issue affected Docker Sandboxes versions 0.35.0 through 0.38.0 and was reported across macOS, Linux, and Windows environments.
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What an attacker gets, and what they’ve been doing with it.
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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.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.