by Kastro
Paper/Archive/CVE-2026-63293

CVE-2026-63293

Canonical LXD — Arbitrary File Read/Write: metadata.yaml symlink in image allows host filesystem access as root

EPSS 0.6%public exploitCVSS 9.9
critical.is priorityof 100
49
CVSS 9.9 (CNA)9.9 / 10 × 3029.7Not in CISA KEV+300.0EPSS percentile 48.3.483 × 209.7Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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 symbolic link. An attacker can exploit this flaw by providing a crafted image archive with a symlinked metadata.yaml file pointing to target file paths on the host system.

Affected

ProductAffectedFixed inSource
LXD4.0.0 – < 4.0.124.0.12CNA
LXD5.0.0 – < 5.0.85.0.8CNA
LXD5.21.0 – < 5.21.65.21.6CNA
LXD6.0 – < 6.106.10CNA

Scores by source

canonical (CNA)9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

exploitgithub.com/canonical/lxd/security/advisories/GHSA-j825-cg34-5fr5