HomeBox: Email Case-Sensitivity Bypass Allows Duplicate Account Creation and Login Denial of Service

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-85287
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-05 17:18:22 UTC
Updated2026-11-09 18:17:34 UTC
DescriptionHomeBox is a home inventory and organization system. Prior to 0.27.0, POST /api/v1/users/register and the users.email uniqueness constraint treat email addresses as case-sensitive while HomeBox uses a case-insensitive login lookup. An unauthenticated attacker who knows a victim's email can register a differently cased variant, creating duplicate rows that cause login to return 401 for both variants and deny the victim access, while also bypassing the one-account-per-email policy. This issue is fixed in version 0.27.0.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

EPSS: 0.002910000 probability, percentile 0.218110000 (date 2026-11-09)

Problem Types: CWE-178 | CWE-1024 | CWE-178 CWE-178: Improper Handling of Case Sensitivity | CWE-1024 CWE-1024: Comparison of Incompatible Types

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Sysadminsmedia Homebox affected < 0.27.0 Not specified

References

ReferenceSourceLinkTags
github.com/sysadminsmedia/homebox/commit/fbf8c8505b47c3d46aa6c17f7c65790... [email protected] github.com
github.com/sysadminsmedia/homebox/security/advisories/GHSA-xqg9-6xxv-3452 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/sysadminsmedia/homebox/releases/tag/v0.27.0 [email protected] github.com
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