HomeBox: Timing Side-Channel in Login Endpoint Allows User Enumeration via Bcrypt Hashing Delay

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-85286
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-05 16:17:50 UTC
Updated2026-11-12 20:07:11 UTC
DescriptionHomeBox 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.

Risk And Classification

Primary CVSS: v3.1 3.7 LOW from [email protected]

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

EPSS: 0.002910000 probability, percentile 0.220050000 (date 2026-11-12)

Problem Types: CWE-204 | CWE-208 | CWE-204 CWE-204: Observable Response Discrepancy | CWE-208 CWE-208: Observable Timing Discrepancy

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Sysadminsmedia Homebox affected < 0.27.0 Not specified

References

ReferenceSourceLinkTags
github.com/sysadminsmedia/homebox/commit/66809ce3583cbd0b43e8f5ce30cc269... [email protected] github.com
github.com/sysadminsmedia/homebox/releases/tag/v0.27.0 [email protected] github.com
github.com/sysadminsmedia/homebox/security/advisories/GHSA-4p8r-vm9v-c9pm [email protected] github.com
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