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CVE-2026-40196— HomeBox has Unauthorized API Access via Retained defaultGroup ID After Group Access Revocation

Quick assessment

Affected
sysadminsmedia homebox
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

HomeBox是SysAdmins Media开源的一个为家庭用户构建的库存和组织系统。 HomeBox 0.25.0之前版本存在安全漏洞，该漏洞源于defaultGroup ID在用户被邀请到组后永久分配，即使其访问权限被撤销，API也未正确验证，可能导致绕过访问控制。

CVSS 8.1 · High EPSS 0.40% · P32
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I. Basic Information for CVE-2026-40196

Vulnerability Information
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Vulnerability Title
HomeBox has Unauthorized API Access via Retained defaultGroup ID After Group Access Revocation
Source: CVE Program / CVE List V5
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ID remained permanently assigned to a user after being invited to a group, even after their access to that group was revoked.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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不正确的属主授予
Source: CVE Program / CVE List V5
Vulnerability Title
HomeBox 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HomeBox是SysAdmins Media开源的一个为家庭用户构建的库存和组织系统。 HomeBox 0.25.0之前版本存在安全漏洞，该漏洞源于defaultGroup ID在用户被邀请到组后永久分配，即使其访问权限被撤销，API也未正确验证，可能导致绕过访问控制。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
sysadminsmedia homebox < 0.25.0 -

II. Public POCs for CVE-2026-40196

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III. Intelligence Information for CVE-2026-40196

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Vendor Advisories for CVE-2026-40196 (1)

Vendor Pages for CVE-2026-40196 (1)

IV. Related Vulnerabilities

Same product: homebox
Same vendor: sysadminsmedia
Same weakness: CWE-708

V. Comments for CVE-2026-40196

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