CVE-2026-26272 HomeBox affected by Stored XSS via HTML/SVG Attachment Upload
An authenticated user can upload malicious HTML or SVG files to HomeBox, leading to stored XSS execution in other users' browsers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-26272?
CVE-2026-26272 is a medium-severity cross-site scripting vulnerability in sysadminsmedia homebox, published on 3 Mar 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
HomeBox is a home inventory and organization system. Prior to 0.24.0-rc.1, a stored cross-site scripting (XSS) vulnerability exists in the item attachment upload functionality. The application does not properly validate or restrict uploaded file types, allowing an authenticated user to upload malicious HTML or SVG files containing executable JavaScript (also, potentially other formats that render scripts). Uploaded attachments are accessible via direct links. When a user accesses such a file in their browser, the embedded JavaScript executes in the context of the application's origin. This vulnerability is fixed in 0.24.0-rc.1.
Weakness: CWE-79
Which versions are affected by CVE-2026-26272?
It affects 1 product.
Products include Sysadminsmedia Homebox.
How do I fix CVE-2026-26272?
No fix has been published for CVE-2026-26272 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-26272 being exploited?
There is no known exploitation of CVE-2026-26272 in the wild and no public exploit code.
Other vulnerabilities in sysadminsmedia homebox
Sources
Also known as GHSA-55fv-9q6q-vpcr.