---
id: "CVE-2026-75599"
kind: "vulnerability"
aliases: ["CVE-2026-75599"]
title: "HomeBox: custom-field links allow javascript URIs, enabling stored XSS"
severity: "medium"
cvss: 5.4
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["homebox", "other", "self-hosted"]
not_affected_if: ["single-trusted-user", "version-0.27.0-or-later"]
published_at: "2026-11-05T17:18:20+00:00"
first_seen_at: "2026-11-05T17:40:05+00:00"
updated_at: "2026-11-05T17:42:35+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-75599", "first_seen_at": "2026-11-05T17:40:05+00:00"}]
exploit_sources: []
---

# HomeBox: custom-field links allow javascript URIs, enabling stored XSS

HomeBox is a self-hosted home inventory app. Before 0.27.0, an authenticated user can store a javascript: link in a custom field, and when another authenticated user clicks it, script runs in the victim's HomeBox session, enabling session theft and account takeover.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the HomeBox version in use; versions before `0.27.0` are affected.
- Look for custom-field values on item pages that contain markdown-style links with a `javascript:` target.

## Fix

- Upgrade HomeBox to `0.27.0` or later.

## Timeline

- 2026-11-05T17:40:05+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-75599

## Documents

- [advisory] Vendor advisory: github.com https://github.com/sysadminsmedia/homebox/security/advisories/GHSA-h4x5-6587-jpwp
- [fix] Patch: github.com https://github.com/sysadminsmedia/homebox/commit/d76b1c9b94e91cd74e56ef8a129325d70835471f
- [fix] Release notes: github.com https://github.com/sysadminsmedia/homebox/releases/tag/v0.27.0

## From the sources

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.

---

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