Vulnerability Description
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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/sysadminsmedia/homebox/commit/ed3216a80998dfd81d4418700696244
- https://github.com/sysadminsmedia/homebox/releases/tag/v0.26.0
- https://github.com/sysadminsmedia/homebox/security/advisories/GHSA-mc8h-5c5v-37p
FAQ
What is CVE-2026-48976?
CVE-2026-48976 is a vulnerability with a CVSS score of 8.1 (HIGH). 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 requir...
How severe is CVE-2026-48976?
CVE-2026-48976 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-48976?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.