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...

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...

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...