External Control of File Name or Path Affecting incus package, versions <6.0.4-2+deb13u9
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN13-INCUS-18489110
- published1 Aug 2026
- disclosed21 Aug 2026
Introduced: 1 Aug 2026
CVE-2026-63343 (opens in a new tab)How to fix?
Upgrade Debian:13 incus to version 6.0.4-2+deb13u9 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream incus package and not the incus package as distributed by Debian.
See How to fix? for Debian:13 relevant fixed versions and status.
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.