CVE-2026-62867: CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') in lxc incus
Description
Incus is a system container and virtual machine manager. Prior to version 7.3.0, improper validation of user-provided `block.create_options` in storage volume configuration leads to argument injection in the constructed filesystem creation command line. This allows a project-scoped user to inject arbitrary arguments into the binary executed as root. Version 7.3.0 patches the issue.
CVSS v3.1
Score 9.9critical
Affected software
lxc
incus
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Incus, a system container and virtual machine manager, suffers from a CWE-88 improper neutralization of argument delimiters vulnerability. Before version 7.3.0, user input in the block.create_options parameter is not properly validated, allowing injection of arbitrary command-line arguments into the filesystem creation command executed with root privileges. This flaw permits privilege escalation by a project-scoped user. The vulnerability is fixed in version 7.3.0.
Potential Impact
An attacker with project-scoped user privileges can inject arbitrary arguments into a root-executed binary, potentially leading to full system compromise with high confidentiality, integrity, and availability impact. The CVSS score of 9.9 reflects critical severity with network attack vector, low attack complexity, and no user interaction required.
Mitigation Recommendations
Upgrade to lxc incus version 7.3.0 or later, where this vulnerability is patched. No other official remediation or temporary fixes are documented. Patch status is confirmed by the vendor stating the issue is fixed in version 7.3.0.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-14T21:10:50.032Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a8869e9acd9273b494e4741
Added to database: 08/21/2026, 15:08:25 UTC
Last enriched: 08/21/2026, 15:22:26 UTC
Last updated: 10/04/2026, 18:53:17 UTC
Views: 94
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