What is CVE-2026-63293?

CVE-2026-63293 is a critical-severity vulnerability in Canonical Lxd, classified under Improper Link Resolution Before File Access. CVSS score: 9.9/10. Published 2026-08-12.

How severe is CVE-2026-63293?

Critical severity. CVSS v3 base score is 9.9 out of 10.

Vulnerability in Canonical Lxd

CVE-2026-63293

A link following vulnerability in LXD allows an attacker to achieve arbitrary file read and write operations on the host system. When importing or unpacking an image archive, LXD fails to validate whether the metadata.yaml file is a symbol…

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Canonical Lxd — versions 4.0.0, 5.0.0, 5.21.0

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

References

security@ubuntu.com (vendor-advisory, vdb-entry)

Frequently asked questions

What is CVE-2026-63293?: CVE-2026-63293 is a critical-severity vulnerability in Canonical Lxd, classified under Improper Link Resolution Before File Access. CVSS score: 9.9/10. Published 2026-08-12.
How severe is CVE-2026-63293?: Critical severity. CVSS v3 base score is 9.9 out of 10.