CVE-2026-62941
Received Received - Intake

Privilege Escalation in Incus via Project Copy Configuration Bypass

Publication date: 2026-08-21

Last updated on: 2026-08-21

Assigner: GitHub, Inc.

Description
Incus is a system container and virtual machine manager. Prior to version 7.3.0, when copying an instance across projects, the project restriction check (`AllowInstanceCreation`) runs BEFORE the source instance's configuration is merged into the request. Dangerous configuration keys (including `security.privileged`, `raw.lxc`, `raw.apparmor`) from the source instance are merged AFTER the check passes, bypassing all project restrictions on the target project. Version 7.3.0 patches the issue.

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Meta Information

Published
2026-08-21
Last Modified
2026-08-21
Generated
2026-08-21
AI Q&A
2026-08-21
EPSS Evaluated
N/A
NVD
CVE-2026-62941
EUVD
EUVD-2026-63951

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
lxc incus to 7.3.0 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

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Executive Summary

CVE-2026-62941 is a vulnerability in Incus versions prior to 7.3.0. It allows bypassing project restrictions when copying an instance across projects. The check for project restrictions runs before merging dangerous configuration keys from the source instance, such as security.privileged or raw.lxc. This lets attackers create privileged containers in restricted projects even if they only have view access in an unrestricted project.

Detection Guidance

Check Incus version with 'incus version' to confirm if it is below 7.3.0. Inspect project restrictions and instance configurations for unsafe keys like security.privileged or raw.lxc using 'incus config show <instance>'.

Impact Analysis

This vulnerability allows an attacker with limited access to escalate privileges by creating a privileged container in a restricted project. This could lead to container escape, unauthorized access to system resources, or full compromise of the host system. The impact includes potential data breaches, unauthorized system access, and loss of isolation between projects.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating compliance requirements for data protection and security. GDPR requires adequate security measures to protect personal data, while HIPAA mandates strict access controls for sensitive health information. Exploitation of this flaw may result in non-compliance, legal penalties, and reputational damage.

Mitigation Strategies

Upgrade Incus to version 7.3.0 or later immediately. Review and restrict project permissions to prevent unauthorized instance copying. Audit existing instances for dangerous configurations.

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