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CVE-2026-66897 is a critical path traversal vulnerability in Canonical LXD instance template processing. Template target paths supplied in image metadata are checked relative to a confined directory handle, but the subsequent file creation uses an unconstrained string path. This validation-to-use mismatch permits crafted template paths to escape the intended confinement and cause LXD, running with host root privileges, to create or overwrite files outside the designated template directory.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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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.
10 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An unpatched vulnerability identified as CVE-2026-66897, with affected Debian Linux 12.0 and 13.0 CPE entries. The content provides CVSS vectors but does not describe the underlying flaw.
A critical path traversal vulnerability in LXD instance template processing that can allow arbitrary host file overwrite as root and lead to host root code execution.
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.