Link Following Vulnerability in LXD by Canonical
CVE-2026-63294

9.9CRITICAL

Key Information:

Vendor

Canonical

Status
Lxd
Vendor
CVE Published:
12 August 2026

What is CVE-2026-63294?

A link following vulnerability in LXD enables attackers to execute arbitrary commands with root privileges on the host system. The flaw arises during the import or unpacking of specifically crafted image or backup archives, where LXD inadequately validates and confines the backup.yaml file when it exists as a symbolic link. This oversight allows an attacker to exploit the system by delivering a malicious archive that contains a symlinked backup.yaml file, ultimately leading to execution of unconfined configuration metadata.

Affected Version(s)

LXD Linux 4.0.0 < 4.0.12

LXD Linux 5.0.0 < 5.0.8

LXD Linux 5.21.0 < 5.21.6

References

https://github.com/canonical/lxd/security/advisories/GHSA...
vdb-entryvendor-advisory

CVSS V3.1

Score:
9.9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.