CVE-2026-62941: CWE-863: Incorrect Authorization in lxc incus
CVE-2026-62941 is a critical authorization vulnerability in Incus, a system container and virtual machine manager. In versions prior to 7.3.0, when copying an instance across projects, the project restriction check occurs before the source instance's dangerous configuration keys are merged. This allows bypassing project restrictions, potentially granting elevated privileges. The issue is patched in version 7.3.0.
AI Analysis
Technical Summary
Incus versions before 7.3.0 contain an incorrect authorization vulnerability (CWE-863) where the project restriction check (AllowInstanceCreation) is performed before merging the source instance's configuration into the request. Dangerous configuration keys such as security.privileged, raw.lxc, and raw.apparmor are merged after the check, allowing an attacker to bypass project restrictions on the target project. This flaw can lead to privilege escalation and compromise of confidentiality, integrity, and availability. The vulnerability has a CVSS 3.1 score of 9.9, indicating critical severity. Version 7.3.0 includes a patch that fixes this issue.
Potential Impact
An attacker with permission to copy instances across projects can bypass project restrictions by exploiting the timing of configuration merging, potentially gaining elevated privileges and full control over the target project. This can lead to complete compromise of confidentiality, integrity, and availability of affected systems.
Mitigation Recommendations
Upgrade Incus to version 7.3.0 or later, where the authorization check is correctly performed after merging the source instance's configuration, preventing bypass of project restrictions. Patch status is confirmed by the vendor advisory indicating version 7.3.0 as fixed.
CVE-2026-62941: CWE-863: Incorrect Authorization in lxc incus
Description
CVE-2026-62941 is a critical authorization vulnerability in Incus, a system container and virtual machine manager. In versions prior to 7.3.0, when copying an instance across projects, the project restriction check occurs before the source instance's dangerous configuration keys are merged. This allows bypassing project restrictions, potentially granting elevated privileges. The issue is patched in version 7.3.0.
CVSS v3.1
Score 9.9critical
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Incus versions before 7.3.0 contain an incorrect authorization vulnerability (CWE-863) where the project restriction check (AllowInstanceCreation) is performed before merging the source instance's configuration into the request. Dangerous configuration keys such as security.privileged, raw.lxc, and raw.apparmor are merged after the check, allowing an attacker to bypass project restrictions on the target project. This flaw can lead to privilege escalation and compromise of confidentiality, integrity, and availability. The vulnerability has a CVSS 3.1 score of 9.9, indicating critical severity. Version 7.3.0 includes a patch that fixes this issue.
Potential Impact
An attacker with permission to copy instances across projects can bypass project restrictions by exploiting the timing of configuration merging, potentially gaining elevated privileges and full control over the target project. This can lead to complete compromise of confidentiality, integrity, and availability of affected systems.
Mitigation Recommendations
Upgrade Incus to version 7.3.0 or later, where the authorization check is correctly performed after merging the source instance's configuration, preventing bypass of project restrictions. Patch status is confirmed by the vendor advisory indicating version 7.3.0 as fixed.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-14T22:32:17.731Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a8869e9acd9273b494e4745
Added to database: 08/21/2026, 15:08:25 UTC
Last enriched: 08/21/2026, 15:22:07 UTC
Last updated: 08/21/2026, 15:27:16 UTC
Views: 5
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