TI-2026-81496 Aliases CVE-2026-116680

Server-side request forgery in Homebox notifier via HTTP redirects

LOW 28CWE-918Published 2026-10-27 · Updated 2026-11-03

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: Low · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

Homebox before 0.27.0 validates generic notifier URLs but follows HTTP redirects without rechecking their targets. This is server-side request forgery (CWE-918). An authenticated collection member can set up a permitted host that redirects to loopback, link-local or cloud metadata addresses, bypassing the SSRF policy. The flaw is reachable through notifier tests and scheduled maintenance delivery.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Description from the CNA

HomeBox is a home inventory and organization system. Prior to version 0.27.0, Homebox validates generic notifier URLs with ValidateNotifierURL before creation, update, testing, and scheduled delivery, but shoutrrr sends the request through http.DefaultClient.Do without a CheckRedirect policy that revalidates each Location target. An authenticated collection member can configure a permitted notifier host that redirects to loopback, link-local, cloud metadata, or another blocked destination, causing the follow-up request to bypass the product's SSRF policy. The flaw is reachable through POST /api/v1/notifiers/test for immediate requests and through stored notifiers during scheduled maintenance delivery. This issue is fixed in version 0.27.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0019 8th percentileScored 2026-11-07

Fix Fixed homebox (sysadminsmedia): 0.27.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
sysadminsmedia	homebox	before 0.27.0	0.27.0	Patch available	CNA

homebox Vendorsysadminsmedia Affected before 0.27.0 Fixed in 0.27.0 Patch available CNA

CPE names Threatist (inferred) · 1

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

CPE	Versions	Role	Vendor
cpe:2.3:a:sysadminsmedia:homebox::::::::	—	—	sysadminsmedia

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

Remediation

Upgrade Homebox to version 0.27.0, the fixed version.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Fix · CNA homebox (sysadminsmedia) Fixed in 0.27.0

Timeline

2026-10-27 Threatist record created from CVE-2026-116680
2026-10-28 Priority changed: MEDIUM → LOW
2026-11-03 CISA SSVC decision points changed

References

Other 3

TI-2026-36232 HomeBox: Cross-Tenant IDOR in Notifier Update Leaks Shoutrrr Credentials and Allows Webhook Hijack CVSS 3.1HIGH 8.1
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

See all 13 →

Sources

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