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TI-2026-85490 Aliases CVE-2026-85286

Timing side channel in HomeBox login reveals registered users

Priority LOW 17CWE-204Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-204.

Summary

HomeBox versions before 0.27.0 have a timing side channel in the POST /api/v1/users/login endpoint. The endpoint runs password-hash verification only when the submitted username matches an existing account, so unknown usernames return faster, even though both cases return the same 401 response. An unauthenticated remote attacker can use this timing difference to determine which email addresses are registered, although rate limiting reduces how many attempts they can make per window.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

HomeBox is a home inventory and organization system. Prior to 0.27.0, the POST /api/v1/users/login endpoint performs password-hash verification only when the submitted username matches an existing account, while unknown usernames return immediately. Although both paths return the same 401 unauthorized response, the processing-time discrepancy allows an unauthenticated remote attacker to distinguish registered email addresses; rate limiting only reduces the number of attempts per window. This issue is fixed in version 0.27.0.

Why it matters now

EPSS 0.00291 21st percentileScored 2026-11-07
Fix Fixed homebox (sysadminsmedia): 0.27.0

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
sysadminsmediahomeboxbefore 0.27.00.27.0Patch availableCNA
  • 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.

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

Remediation

Upgrade sysadminsmedia HomeBox to version 0.27.0, which fixes the issue.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

  • Fix · CNA homebox (sysadminsmedia) Fixed in 0.27.0

Timeline

  1. 2026-11-05 Threatist record created from CVE-2026-85286

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