CVE-2026-55466 Snipe-IT: Stored XSS via inline-served attachment
A low-privilege user can upload malicious SVG files that execute JavaScript in other users' browsers due to improper sanitization and inline serving.
- 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
- Available
What is CVE-2026-55466?
CVE-2026-55466 is a medium-severity cross-site scripting vulnerability in Snipeitapp Snipe-It, published on 10 Jul 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
Snipe-IT is an IT asset/license management system. Prior to 8.6.2, UploadFileRequest sanitizes SVG content only when PHP finfo reports image/svg+xml and UploadedFilesController serves attachments inline without using StorageHelper::allowSafeInline(), allowing a low-privilege user to upload active XHTML or XML content that is later served same-origin and executes JavaScript in a viewer’s browser. This issue is fixed in version 8.6.2.
Weakness: CWE-79
Which versions are affected by CVE-2026-55466?
2 open source packages ship an affected version, including snipe/snipe-it. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
snipe/snipe-it Packagist | All versions | 8.6.2 |
snipe/snipe-it Packagist | All versions | 8.6.2 |
Products include Snipeitapp Snipe-It.
How do I fix CVE-2026-55466?
Upgrade snipe/snipe-it to 8.6.2 or later.
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-2026-55466 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-55466 exists.
Other vulnerabilities in Snipeitapp Snipe-It
- CVE-2025-63601 File upload in n/a
- CVE-2026-37709 Snipe-IT has insecure permissions in file uploads
- CVE-2026-86738 Snipe-IT before 8.7.0 CSS Injection via Custom CSS
- CVE-2026-116199 Snipe-IT before 8.6.3 Authentication Bypass via Google SSO Callback
- CVE-2022-1380 Stored Cross Site Scripting vulnerability in Item name parameter in snipe/snipe-it
Sources
Also known as GHSA-jhph-5q74-pmfx.