CVE-2026-63293

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

State: Published
Severity: 9.9 Critical
Published: Aug 12, 2026
Updated: Aug 13, 2026
Reserved: Jul 16, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	9.9 Critical	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	canonical

Weaknesses

CWE-59 Improper Link Resolution Before File Access ('Link Following')

Affected Products

Product	Versions
LXDCanonical	4.0.0 to before 4.0.12Affected 5.0.0 to before 5.0.8Affected 5.21.0 to before 5.21.6Affected 6.0 to before 6.10Affected

References

https://github.com/canonical/lxd/security/advisories/GHSA-j825-cg34-5fr5vdb-entryvendor-advisory

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.