NiceGUI apps are vulnerable to XSS which uses `ui.sub_pages` and render arbitrary user-provided links

SummaryAn unsafe implementation in the click event listener used by ui.subpages, combined with attacker-controlled link rendering on the page, causes an XSS when the user actively clicks on the link. Details1. On click, eventually subpagesnavigate event is...

PYSEC-2026-1701 NiceGUI apps are vulnerable to XSS which uses `ui.sub_pages` and render arbitrary user-provided links

Summary An unsafe implementation in the click event listener used by ui.subpages, combined with attacker-controlled link rendering on the page, causes an XSS when the user actively clicks on the link. Details 1. On click, eventually subpagesnavigate event is emitted...

Mozilla: CSP sandbox header without `allow-scripts` can be bypassed via retargeted javascript: URI

The Mozilla Foundation Security Advisory describes this flaw as: An iframe that was not permitted to run scripts could do so if the user clicked on a javascript: link...