Quick answers
- Is CVE-2026-75599 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-75599 being exploited in the wild.
- How severe is CVE-2026-75599?
- Medium severity, with a CVSS score of 5.4, published 5 November 2026.
- Which products and versions are affected?
- HomeBox before 0.27.0.
- Is there a fix for CVE-2026-75599?
- Yes: fixed in 0.27.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-75599 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-75599?
- Check whether you run HomeBox at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 0.27.0
Technical details
The maybeUrl() utility fails to restrict URL schemes when parsing markdown-style links in entity custom-field values, allowing storage of javascript: and data: URIs. An authenticated user can inject these schemes, which are then rendered as clickable anchors on item pages. When another authenticated user clicks the malicious link, the attacker's script executes within the HomeBox origin, gaining access to the victim's session context and sensitive data.
Affected products
- HomeBox HomeBox before 0.27.0
Timeline
- 2026-11-05: disclosed