CVE-2026-66898 — Path traversal via unvalidated instance name in backup tarball restore enables root file write / RCE
A path traversal vulnerability in LXD allows an attacker to manipulate file system paths during backup import and restore operations. When importing or restoring a backup archiv…
Published: 2026-08-12 · CVSS: 9.9 · CVSS 3.1
A path traversal vulnerability in LXD allows an attacker to manipulate file system paths during backup import and restore operations. When importing or restoring a backup archive, LXD fails to validate instance and storage volume names contained within the archive metadata. An attacker can exploit this flaw by supplying a crafted backup archive with malicious instance or volume names containing path traversal sequences, potentially allowing file access or overwriting outside the designated restore directory.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7