https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-05T23:58:50.609115+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/fkie_cve-2026-91127 fkie_cve-2026-91127 2026-10-05T23:58:50.777156+00:00

File Viewer is a browser-native viewer for Office, PDF, CAD, archive, and other files in private and internal web applications. Prior to @file-viewer/doc 2.3.1 and msdoc-viewer 0.2.2, the legacy DOC renderer emitted document-controlled hyperlink targets into generated HTML after character escaping but without restricting URL schemes. A crafted legacy DOC file could place javascript:, vbscript:, data:, or another unsafe scheme in a rendered link, and script could execute in the embedding application's origin when a user clicked the link. The fix blocks external document links by default, allows only HTTP(S), mail, telephone, safe relative URLs, and internal bookmarks when external links are explicitly enabled, and applies mount-boundary sanitization as defense in depth. This issue is fixed in @file-viewer/doc 2.3.1 and msdoc-viewer 0.2.2.

 https://vulnerability.circl.lu/vuln/ghsa-3753-m2x2-q623 GHSA-3753-m2x2-q623 — File Viewer: DOM XSS via unsafe hyperlink schemes in the legacy DOC renderer 2026-10-05T23:58:50.777267+00:00

Affected: npm: @file-viewer/doc, npm: msdoc-viewer

### Summary

Before 2.3.1, the legacy `.doc` renderer emitted document hyperlink targets after HTML escaping but without a URL-scheme allowlist. A crafted `.doc` could therefore render a live `javascript:`, `vbscript:`, `data:`, or similarly unsafe link. Script could execute in the embedding origin if a viewer clicked it.

### Impact

Applications rendering untrusted legacy `.doc` files with `@file-viewer/doc` or the `msdoc-viewer` compatibility package could expose their origin to attacker-controlled script after link interaction.

### Fix

Version 2.3.1 centralizes link handling, removes control-character and scheme confusion, blocks external document links by default, and in explicit allow mode accepts only HTTP(S), mail, telephone, safe relative URLs, and internal bookmarks. The renderer output is safe before mounting, with mount-boundary sanitization as defense in depth. The `msdoc-viewer` compatibility release containing the fix is 0.2.2.

Thanks to @shashank420 for responsibly reporting this issue.