CVE-2026-86335: CWE-862 Missing Authorization in Canonical LXD
Missing Authorization in imageDownload in Canonical LXD before 5.0.10, 5.21.8, and 6.10 on Linux allows a project-restricted client to access private images from other projects via local fingerprint reuse during image or instance import requests.
AI Analysis
Technical Summary
This vulnerability (CWE-862) in Canonical LXD's imageDownload function permits unauthorized access to private images across projects. Specifically, project-restricted clients can exploit local fingerprint reuse during image or instance import requests to access images they should not have permission to view. Affected versions include LXD before 5.0.10, versions from 5.21.0 up to but not including 5.21.8, and versions from 6.0 up to but not including 6.10 on Linux systems.
Potential Impact
An attacker with project-restricted client privileges can bypass authorization controls to access private images belonging to other projects. This results in unauthorized disclosure of potentially sensitive image data. The vulnerability does not impact integrity or availability but has a high confidentiality impact.
Mitigation Recommendations
A fix is available in Canonical LXD versions 5.0.10, 5.21.8, and 6.10 and later. Users should upgrade to these versions to remediate the vulnerability. No vendor advisory content was provided to indicate alternative mitigations or temporary fixes.
CVE-2026-86335: CWE-862 Missing Authorization in Canonical LXD
Description
Missing Authorization in imageDownload in Canonical LXD before 5.0.10, 5.21.8, and 6.10 on Linux allows a project-restricted client to access private images from other projects via local fingerprint reuse during image or instance import requests.
CVSS v3.1
Score 6.3medium
Affected software
Canonical
LXD
pkg:github/LXDRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-862) in Canonical LXD's imageDownload function permits unauthorized access to private images across projects. Specifically, project-restricted clients can exploit local fingerprint reuse during image or instance import requests to access images they should not have permission to view. Affected versions include LXD before 5.0.10, versions from 5.21.0 up to but not including 5.21.8, and versions from 6.0 up to but not including 6.10 on Linux systems.
Potential Impact
An attacker with project-restricted client privileges can bypass authorization controls to access private images belonging to other projects. This results in unauthorized disclosure of potentially sensitive image data. The vulnerability does not impact integrity or availability but has a high confidentiality impact.
Mitigation Recommendations
A fix is available in Canonical LXD versions 5.0.10, 5.21.8, and 6.10 and later. Users should upgrade to these versions to remediate the vulnerability. No vendor advisory content was provided to indicate alternative mitigations or temporary fixes.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- canonical
- Date Reserved
- 2026-09-07T08:01:22.942Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aba6c9ef7a7c54106b98909
Added to database: 09/28/2026, 13:33:18 UTC
Last enriched: 09/28/2026, 13:48:38 UTC
Last updated: 09/29/2026, 01:57:22 UTC
Views: 13
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