EUVD-2026-265208

fkie_cve-2026-22256

Salvo is a Rust web backend framework. Prior to version 0.88.1, the function list_html generate an file view of a folder which include a render of the current path, in which its inserted in the HTML without proper sanitation, this leads to reflected XSS using the fact that request path is decoded and normalized in the matching stage but not is inserted raw in the html view (current.path), the only constraint here is for the root path (eg. /files in the PoC example) to have a sub directory (e.g common ones styles/scripts/etc…) so that the matching return the list HTML page instead of the Not Found page. This issue has been patched in version 0.88.1.

GHSA-rjf8-2wcw-f6mp — Salvo is vulnerable to reflected XSS in the list_html function

Affected: crates.io: salvo

# Summary

The function `list_html` generates an file view of a folder which includes a render of the current path, in which its inserted in the HTML without proper sanitation, leading to reflected XSS. The request path is decoded and normalized in the matching stage but is not inserted raw in the HTML view (current.path). The only constraint here is for the root path (e.g., /files in the PoC example) to have a subdirectory (e. g., common ones like styles/scripts/etc.) so that the matching returns the list HTML page instead of the Not Found page.

# Details

The vulnerable snippet of code is the following: [**dir.rs**](https://github.com/salvo-rs/salvo/blob/16efeba312a274739606ce76366d921768628654/crates/serve-static/src/dir.rs#L593)

```rust // ... fn list_html(... let mut ftxt = format!( r#"<!DOCTYPE html><html><head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width"> <title>{}</title> <style>{}</style></head><body><header><h3>Index of: {}</h3></header><hr/>"#, current.path, HTML_STYLE, header_links(&current.path) ); // ... ```

As seen here `<title>{}</title>` it is inserted unsafely.

# PoC

https://github.com/user-attachments/assets/92a29a67-547b-40a5-af26-f1b0dd332702

Here is the example app, note this doesn’t need an upload feature (e.g to the other reported vulnerability), only the sub-folder is required.

`main.rs` ```rust use salvo::prelude::*; use salvo::serve_static::…

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EUVD-2026-265208

fkie_cve-2026-22256

GHSA-rjf8-2wcw-f6mp — Salvo is vulnerable to reflected XSS in the list_html function