# CVE-2026-63343: incus: Incus is a system container and virtual machine manager

CVE-2026-63343 is fixed in incus on 1 platform, first by DEBIAN-CVE-2026-63343, released August 1, 2026. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2026-63343
- Priority: Urgent
- CVSS: 9.9 (critical)
- EPSS: 0.0048
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 21, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | incus Debian 13.5 (trixie) | 6.0.4-2+deb13u9 | [DEBIAN-CVE-2026-63343](https://patchblox.com/security/data/fix/linux/debian-cve-2026-63343.md) | Aug 1, 2026 |
| Linux | incus Debian 14 | 7.0.1-2 | [DEBIAN-CVE-2026-63343](https://patchblox.com/security/data/fix/linux/debian-cve-2026-63343.md) | Aug 1, 2026 |

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Data as of 2026-11-09T19:38:12Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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