Vulnerability 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ID remained permanently assigned to a user after being invited to a group, even after their access to that group was revoked.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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Sysadminsmedia | Homebox | < 0.25.0 |
Related Weaknesses (CWE)
References
- https://github.com/sysadminsmedia/homebox/releases/tag/v0.25.0ProductRelease Notes
- https://github.com/sysadminsmedia/homebox/security/advisories/GHSA-6pvm-v73p-p6mVendor Advisory
FAQ
What is CVE-2026-40196?
CVE-2026-40196 is a vulnerability with a CVSS score of 8.1 (HIGH). 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, ...
How severe is CVE-2026-40196?
CVE-2026-40196 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-40196?
Check the references section above for vendor advisories and patch information. Affected products include: Sysadminsmedia Homebox.