Access Control Vulnerability in HomeBox Inventory System
CVE-2026-40196

8.1HIGH

Key Information:

Vendor

Sysadminsmedia

Status
Homebox
Vendor
CVE Published:
17 April 2026

What is CVE-2026-40196?

HomeBox, a home inventory and organization system, has a vulnerability in versions before 0.25.0 where the defaultGroup ID remains improperly assigned to users after access to a group is revoked. While the web interface restricts these users from viewing or modifying group content, the API inconsistently allows full CRUD operations, compromising intended access controls. This flaw arises from the inadequate validation of the defaultGroup value when the X-Tenant header is omitted, enabling unauthorized interactions with the group's collections. This issue has been addressed in version 0.25.0.

Affected Version(s)

homebox < 0.25.0

References

https://github.com/sysadminsmedia/homebox/security/adviso...
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https://github.com/sysadminsmedia/homebox/releases/tag/v0...
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CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.