VULNERABILITY INTELLIGENCE

CVE-2026-63343

CVSS score9.9 CRITICAL
EPSS probability0.48%
CISA KEVNot currently listed
Published2026-08-21
Last modified2026-10-15
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

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.

Weakness classification

  • security-advisories@github.com: CWE-73

Primary references