CVE-2026-63294Root RCE via image backup.yaml symlink
Updated under an hour ago ()
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It affects Canonical LXD. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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A link following vulnerability in LXD allows an attacker to achieve root command execution on the host system. During the import or unpacking of crafted image or backup archives, LXD fails to properly validate and confine the backup.yaml file when it exists as a symbolic link. An attacker can exploit this flaw by providing a malicious archive with a symlinked backup.yaml file, causing LXD to process unconfined configuration metadata and execute arbitrary commands with root privileges.
- CVSS
- 9.9 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-59
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- canonical
- NVD analysis
- Analyzed
- Record last updated
- Aug 13, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Canonical LXD canonical:lxd (from the name) | from 4.0.0 before 4.0.12; from 5.0.0 before 5.0.8; from 5.21.0 before 5.21.6; from 6.0 before 6.10 | CNA record |
canonical lxd canonical:lxd | from 4.0.0 before 4.0.12; from 5.0.0 before 5.0.8; from 5.1 before 5.21.6; from 6.0 before 6.10 | NVD |
References
- https://github.com/canonical/lxd/security/advisories/GHSA-fv82-v4fj-mm4mvdb-entry, vendor-advisory, third-party-advisory, exploit, mitigation
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.