Critical severity · published Aug 21, 2026
CVE-2026-63125
Incus vulnerable to root RCE via image backup.yaml symlink
9.9
CVSS
0.7%
EPSS
No
On KEV
Description
Incus is a system container and virtual machine manager. Prior to version 7.3.0, an unprivileged, project-confined Incus user (a non-admin TLS/RBAC identity with `can_create_images` and `can_create_instances`) can execute arbitrary code as root on the host. A crafted image ships `backup.yaml` as a symlink to a host file. When the root daemon writes the instance's backup file, it follows the symlink. Version 7.3.0 patches the issue.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IN
incus · lxc
< 7.3.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-63125
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-63125
github.com
https://github.com/lxc/incus/security/advisories/GHSA-6rqx-22hc-qm36
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