Link Following Vulnerability in LXD by Canonical
CVE-2026-63293

9.9CRITICAL

Key Information:

Vendor

Canonical

Status
Lxd
Vendor
CVE Published:
12 August 2026

What is CVE-2026-63293?

A vulnerability in the LXD system allows attackers to exploit symbolic links during image archive imports or unpacking, leading to unauthorized file access on the host system. Specifically, the absence of proper validation for the metadata.yaml file can result in arbitrary file read and write operations, enabling attackers to manipulate critical files without detection. It is crucial for users to apply security patches and verify the integrity of their image archives to mitigate the risks associated with this vulnerability.

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

.