WS-2026-0176
Published:October 29, 2026
Updated:November 04, 2026
Incus: authentication and authorization bypass through unverified client certificate chains. The HTTPS API accepted a client when any certificate in the presented chain was trusted, not only the leaf, so an attacker with network access and a trusted client's public certificate could impersonate that client and gain full instance and cluster management. Fixed in 7.6.0.
Affected Packages
https://github.com/lxc/incus.git (GITHUB):
Affected version(s) >=v0.1.0 <v7.6.0 || >=v6.0.0 <v7.6.0 || >=v7.0.0 <v7.6.0Fix Suggestion:
Update to version v7.6.0github.com/lxc/incus/v7 (GO):
Affected version(s) >=v7.0.0 <v7.6.0Fix Suggestion:
Update to version v7.6.0github.com/lxc/incus/v7/cmd/incusd (GO):
Affected version(s) >=v7.0.0 <v7.6.0Fix Suggestion:
Update to version v7.6.0Related Resources (2)
Do you need more information?
Contact UsCVSS v4
Base Score:
10
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
HIGH
CVSS v3
Base Score:
10
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH