HomeBox: Timing Side-Channel in Login Endpoint Allows User Enumeration via Bcrypt Hashing Delay
- Exploited
- No known exploitation
- Fix
- Fixed in 0.27.0
- Who is exposed
- Not reported
Do first: Upgrade to a fixed version: 0.27.0.
- Last modified
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 21/100 · provisional
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
HomeBox, a home inventory and organization system, has a timing side-channel flaw in its login endpoint that lets a remote attacker without logging in tell which email addresses have registered accounts. The attacker gains only that information about existing users, not access to accounts or data.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
Read the original description
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.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure17/25No login or user action needed per the CVSS vector, reachable over the network without a login · Unknown: No advisory context yet
- Reach?/20Unknown. No tracked technology or package matched
- Severity3.7/10CVSS 3.7
- No patch0/5No signal
What would change the score
- Would score about 66 if added to CISA KEV
- Would score about 61 if CISA's SSVC rates exploitation active
- Would score about 26 if advisories confirm default setups are exposed
What to do
Upgrade to a fixed version: 0.27.0.
Timeline
- CVE published
- First seen by cve.now
Affected versions
- sysadminsmedia homebox
fixed in 0.27.0
Evidence 3
- Advisory
- Repository
- Repository
Corrections
None so far.
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Questions about CVE-2026-85286
Is CVE-2026-85286 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
Which versions are affected by CVE-2026-85286?
homebox: before 0.27.0.Source: cve.now feed data
How do I fix CVE-2026-85286?
Upgrade to a fixed version: 0.27.0.Source: cve.now feed data