{"id":"CVE-2026-63343","title":"Incus is a system container and virtual machine manager","summary":"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 o…","severity":"critical","cvss":9.9,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cwe":["CWE-73"],"published":"2026-08-21","updated":"2026-09-18","sourceUpdated":"2026-09-18T20:09:01.757","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-63343","references":[{"url":"https://github.com/lxc/incus/security/advisories/GHSA-fmjx-5j3g-997p","label":"security-advisories@github.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63343.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-63343"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63343"}],"tags":["nvd","csaf","vex","red-hat"],"epss":0.00479,"epssPercentile":0.38763,"ingestedAt":"2026-09-18T20:51:25.654Z","vendor":"Red Hat","slug":"CVE-2026-63343","body":"## Overview\n\nIncus 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · updated 2026-09-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63343.json)","depth":"midnight","depthScore":55,"depthScoreParts":{"impact":54.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}