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CVE-2026-48974— HomeBox: Forced Group Membership Without Consent in Homebox AddMember Handler

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 is a home inventory and organization system. Prior to 0.26.0, POST /v1/groups/members invokes HandleGroupMemberAdd and GroupService.AddMember using a caller-supplied userID without requiring an owner role, an invitation token, target-user consent, or t

CVSS 5.4 · Medium EPSS 0.17% · P7

Affected Version Matrix 1

VendorProduct Version RangeStatus
sysadminsmedia homebox < 0.26.0 affected
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I. Basic Information for CVE-2026-48974

Vulnerability Information

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Vulnerability Title
HomeBox: Forced Group Membership Without Consent in Homebox AddMember Handler
Source: CVE Program / CVE List V5
Vulnerability Description
HomeBox is a home inventory and organization system. Prior to 0.26.0, POST /v1/groups/members invokes HandleGroupMemberAdd and GroupService.AddMember using a caller-supplied userID without requiring an owner role, an invitation token, target-user consent, or target-user notification. Any authenticated user can force another account into the caller's group, disclose the target user's email address and name through the resulting member list, and create the membership prerequisite used by a separate cross-group inventory-wipe vulnerability. This issue is fixed in version 0.26.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
行为工作流的不恰当实施
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
sysadminsmedia homebox < 0.26.0 -

II. Public POCs for CVE-2026-48974

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III. Intelligence Information for CVE-2026-48974

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Other References for CVE-2026-48974 (2)

Same Patch Batch · sysadminsmedia · 2026-09-21 · 5 CVEs total

CVE-2026-48976 8.1 HIGH HomeBox: Cross-Tenant IDOR in Notifier Update Leaks Shoutrrr Credentials and Allows Webhoo
CVE-2026-48826 8.1 HIGH HomeBox: Cross-Group Inventory Wipe in Homebox via Global Owner Role and X-Tenant Header S
CVE-2026-48975 8.1 HIGH HomeBox: Cross-Tenant IDOR in MaintenanceEntry Update and Delete Allows Tampering and Dest
CVE-2026-55473 6.0 MEDIUM HomeBox: Notifier SSRF guard misses NAT64 prefixes (64:ff9b::/96, 64:ff9b:1::/48) — generi

IV. Related Vulnerabilities

Same product: homebox
Same vendor: sysadminsmedia
Same weakness: CWE-841

V. Comments for CVE-2026-48974

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