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TI-2026-36232 Aliases CVE-2026-48976

HomeBox: Cross-Tenant IDOR in Notifier Update Leaks Shoutrrr Credentials and Allows Webhook Hijack

Priority LOW 38CWE-522Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure, Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-522 and CWE-639.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00449 39th percentileScored 2026-11-07
Fix Fixed homebox (sysadminsmedia): 0.26.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
sysadminsmediahomeboxbefore 0.26.00.26.0Patch availableCNA
  • homebox Vendorsysadminsmedia Affected before 0.26.0 Fixed in 0.26.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:sysadminsmedia:homebox:*:*:*:*:*:*:*:*——sysadminsmedia
  • cpe:2.3:a:sysadminsmedia:homebox:*:*:*:*:*:*:*:* Versions — — ·sysadminsmedia

Remediation

  • Fix · CNA homebox (sysadminsmedia) Fixed in 0.26.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-48976

References

Other 3

  • TI-2026-36231 Authorization bypass in sysadminsmedia homebox CVSS 3.1HIGH 8.1
  • TI-2026-29010 HomeBox has Unauthorized API Access via Retained defaultGroup ID After Group Access Revocation CVSS 3.1HIGH 8.1
  • TI-2026-36094 HomeBox: Cross-Group Inventory Wipe in Homebox via Global Owner Role and X-Tenant Header Switching CVSS 3.1HIGH 8.1
  • TI-2026-22323 HomeBox has an Auth Rate Limit Bypass via IP Spoofing CVSS 3.1HIGH 7.4
  • TI-2026-85499 Email case sensitivity in HomeBox allows duplicate accounts CVSS 3.1MEDIUM 6.5
  • TI-2026-81496 Server-side request forgery in Homebox notifier via HTTP redirects CVSS 3.1MEDIUM 6.4
See all 13 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences