CVEvulnerability

CVE-2026-63343

9.9 CRITICAL Published 2026-08-21 Modified 2026-10-15 Official page ↗
Status
Deferred
Published
2026-08-21
Last modified
2026-10-15
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.9 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weaknesses
CWE-73

Description

Incus is a system container and virtual machine manager. Prior to version 7.3.0, a malicious image containing a `metadata.yaml` symlink pointing to an arbitrary host path allows an authenticated Incus user to read or overwrite any file on the host as root via the instance metadata API. The `exec-output` and `templates/` paths were patched in a prior release using `Lstat` rejection and `os.OpenRoot` confinement; `metadata.yaml` was not included in either patch and remains exploitable. Version 7.3.0 patches the issue.

Related

Weakness · CWE (1)

  • CWE-73 External Control of File Name or Path weakness

References