Is CVE-2026-66898 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-66898?

CVE-2026-66898 has a CVSS v3 severity of CRITICAL (9.9).

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CVE-2026-66898

Description

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.