CVE-2026-62313: CWE-863: Incorrect Authorization in lxc incus
Description
CVE-2026-62313 is an authorization vulnerability in the Incus container and virtual machine manager prior to version 7.3.0. The issue allows users to bypass project-level restrictions intended to enforce isolated privilege containers by omitting a specific configuration key. This results in containers sharing the host's UID/GID map rather than having isolated mappings, weakening tenant isolation. The vulnerability is patched in version 7.3.0.
CVSS v3.1
Score 4.3medium
Affected software
lxc
incus
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Incus versions before 7.3.0 fail to properly enforce the project-level restriction 'restricted.containers.privilege=isolated' due to incorrect handling of the 'security.idmap.isolated' key. When this key is omitted, it defaults to false (non-isolated), allowing users to create containers that share the host UID/GID map despite the restriction forbidding this. This bypass undermines the isolation guarantees between containers and the host, potentially weakening security boundaries. The issue is fixed in version 7.3.0.
Potential Impact
The vulnerability allows users to create containers with shared host UID/GID mappings in projects configured to forbid such containers, weakening isolation boundaries between containers and the host. This may increase the risk of privilege escalation or unauthorized access within multi-tenant environments. There is no direct confidentiality or integrity impact reported, and no known exploits in the wild.
Mitigation Recommendations
Upgrade Incus to version 7.3.0 or later, where this authorization bypass is patched. No other mitigation is indicated or required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-13T19:27:58.314Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a8869e9acd9273b494e473f
Added to database: 08/21/2026, 15:08:25 UTC
Last enriched: 09/11/2026, 02:33:59 UTC
Last updated: 10/05/2026, 18:48:21 UTC
Views: 83
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