CVE-2026-40196: CWE-708: Incorrect Ownership Assignment in sysadminsmedia homebox
HomeBox is a home inventory and organization system. Versions prior to 0.25.0 contain a vulnerability where the defaultGroup ID remained permanently assigned to a user after being invited to a group, even after their access to that group was revoked. While the web interface correctly enforced the access revocation and prevented the user from viewing or modifying the group's contents, the API did not. Because the original group ID persisted as the user's defaultGroup, and this value was not properly validated when the X-Tenant header was omitted, the user could still perform full CRUD operations on the group's collections through the API, bypassing the intended access controls. This issue has been fixed in version 0.25.0.
AI Analysis
Technical Summary
HomeBox versions before 0.25.0 contain an incorrect ownership assignment vulnerability (CWE-708) where the defaultGroup ID persisted for a user after group access revocation. The web interface correctly blocked access, but the API failed to validate the defaultGroup ID when the X-Tenant header was missing, enabling the user to bypass access controls and perform create, read, update, and delete operations on the group's collections. This vulnerability is addressed in version 0.25.0.
Potential Impact
An attacker with at least limited privileges could exploit this vulnerability to bypass intended access controls via the API and perform unauthorized full CRUD operations on group collections. This leads to high confidentiality and integrity impact, as sensitive group data could be accessed or modified without proper authorization. Availability impact is not affected.
Mitigation Recommendations
Upgrade HomeBox to version 0.25.0 or later, where this vulnerability has been fixed. Patch status is confirmed by the vendor's versioning information. No additional mitigations are indicated.
CVE-2026-40196: CWE-708: Incorrect Ownership Assignment in sysadminsmedia homebox
Description
HomeBox is a home inventory and organization system. Versions prior to 0.25.0 contain a vulnerability where the defaultGroup ID remained permanently assigned to a user after being invited to a group, even after their access to that group was revoked. While the web interface correctly enforced the access revocation and prevented the user from viewing or modifying the group's contents, the API did not. Because the original group ID persisted as the user's defaultGroup, and this value was not properly validated when the X-Tenant header was omitted, the user could still perform full CRUD operations on the group's collections through the API, bypassing the intended access controls. This issue has been fixed in version 0.25.0.
CVSS v3.1
Score 8.1high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
HomeBox versions before 0.25.0 contain an incorrect ownership assignment vulnerability (CWE-708) where the defaultGroup ID persisted for a user after group access revocation. The web interface correctly blocked access, but the API failed to validate the defaultGroup ID when the X-Tenant header was missing, enabling the user to bypass access controls and perform create, read, update, and delete operations on the group's collections. This vulnerability is addressed in version 0.25.0.
Potential Impact
An attacker with at least limited privileges could exploit this vulnerability to bypass intended access controls via the API and perform unauthorized full CRUD operations on group collections. This leads to high confidentiality and integrity impact, as sensitive group data could be accessed or modified without proper authorization. Availability impact is not affected.
Mitigation Recommendations
Upgrade HomeBox to version 0.25.0 or later, where this vulnerability has been fixed. Patch status is confirmed by the vendor's versioning information. No additional mitigations are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-09T20:59:17.620Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69e2a136bdfbbecc59908358
Added to database: 4/17/2026, 9:08:06 PM
Last enriched: 4/25/2026, 2:59:50 AM
Last updated: 6/5/2026, 8:14:50 AM
Views: 73
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