---
id: CVE-2026-75599
title: 'HomeBox: Stored XSS via `javascript:` URI in Custom Entity Fields'
summary: >-
  HomeBox is a home inventory and organization system. Prior to 0.27.0, the
  maybeUrl() utility accepts markdown-style links in entity custom-field values
  without restricting the URL scheme, so an authenticated user can store a
  javascript: …
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: sysadminsmedia
product: homebox
affected:
  - homebox < 0.27.0
published: '2026-11-05'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T16:02:37.520Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-75599'
references:
  - url: >-
      https://github.com/sysadminsmedia/homebox/security/advisories/GHSA-h4x5-6587-jpwp
    label: >-
      https://github.com/sysadminsmedia/homebox/security/advisories/GHSA-h4x5-6587-jpwp
  - url: >-
      https://github.com/sysadminsmedia/homebox/commit/d76b1c9b94e91cd74e56ef8a129325d70835471f
    label: >-
      https://github.com/sysadminsmedia/homebox/commit/d76b1c9b94e91cd74e56ef8a129325d70835471f
  - url: 'https://github.com/sysadminsmedia/homebox/releases/tag/v0.27.0'
    label: 'https://github.com/sysadminsmedia/homebox/releases/tag/v0.27.0'
tags:
  - cve.org
ingestedAt: '2026-11-05T22:38:31.320Z'
---

## Overview

HomeBox is a home inventory and organization system. Prior to 0.27.0, the maybeUrl() utility accepts markdown-style links in entity custom-field values without restricting the URL scheme, so an authenticated user can store a javascript: URI that is rendered as a clickable anchor on an item page. When another authenticated user clicks the link, attacker-controlled JavaScript executes in the victim's HomeBox origin, enabling session theft, account takeover, or data exfiltration. This issue is fixed in version 0.27.0.

## Affected

- `homebox < 0.27.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.