# 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.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N`)
- **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 available:** No
- **Published:** 7 Apr 2026
- **Updated:** 7 Apr 2026
- **Also known as:** GHSA-f577-ffvv-w6rr

## 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 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-35608?

It affects 1 product.


Products: 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.

## Is CVE-2026-35608 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-35608 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-35608 and fix it if it is affected.

What it is: 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.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-35608 exists.

Affected product: RoastSlav quickdrop. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-35608/ (Markdown: https://insights.sbomify.com/CVE-2026-35608/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-35608
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-35608
- OSV: https://osv.dev/vulnerability/CVE-2026-35608

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-35608/
Summaries are generated and may contain mistakes; the official description above is the record.