CVE-2026-35608 QuickDrop has stored XSS in SVG file preview endpoint allowing JavaScript execution
Attackers can execute arbitrary JavaScript in victim browsers by uploading malicious SVG files to the QuickDrop file sharing application.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-35608?
CVE-2026-35608 is a medium-severity cross-site scripting vulnerability in RoastSlav quickdrop, published on 7 Apr 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
QuickDrop is an easy-to-use file sharing application. Prior to 1.5.3, a stored XSS vulnerability exists in the file preview endpoint. The application allows SVG files to be uploaded via the /api/file/upload-chunk endpoint. An attacker can upload a specially crafted SVG file containing a JavaScript payload. When any user views the file preview, the script executes in the context of the application's domain. This vulnerability is fixed in 1.5.3.
Weakness: CWE-79
Which versions are affected by CVE-2026-35608?
It affects 1 product.
Products include Roastslav Quickdrop.
How do I fix CVE-2026-35608?
No fix has been published for CVE-2026-35608 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-2026-35608 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-35608 exists.
Sources
Also known as GHSA-f577-ffvv-w6rr.