CVE-2026-48976

HomeBox is a home inventory and organization system. Prior to 0.26.0, NotifierRepository.Update in backend/internal/data/repo/repo_notifier.go updates a notifier through UpdateOneID(id) without requiring the record's user ID to match the authenticated user. An authenticated user who supplies another tenant's notifier UUID to PUT /v1/notifiers/{id} can read the returned stored url, which may contain plaintext Shoutrrr credentials for Slack, SMTP, Telegram, Pushover, or Discord, and can replace the URL to redirect the victim's notifications to an attacker-controlled webhook. This issue is fixed in version 0.26.0.

Score

CVSS 3.1 8.1 High

Status

Deferred - security-advisories@github.com

Published

2026-09-21

Last modified

2026-09-21

Weaknesses

CWE-522, CWE-639

Affected products

• Homebox (Sysadminsmedia)

References

• https://github.com/sysadminsmedia/homebox/commit/ed3216a80998dfd81d4418700696244144883160
• https://github.com/sysadminsmedia/homebox/releases/tag/v0.26.0
• https://github.com/sysadminsmedia/homebox/security/advisories/GHSA-mc8h-5c5v-37p7