KatexRenderer rendered the raw math source through {@html} whenever renderToString threw. throwOnError only suppresses KaTeX ParseError, so a RangeError (maximum call stack size exceeded, reachable with deeply-nested brace input) escaped into the catch and re-exposed the unescaped source. Because the math tokenizer captures everything between the delimiters verbatim, that source can carry an HTML/JS payload which then executed in the viewer's browser on the application origin, a stored, cross-user XSS reachable through normal chat/channel/shared-chat rendering. Escape the fallback so the source is shown as text and is never injected as HTML. Valid math is unaffected, it still renders through the success path.
Co-authored-by: maxntv <maxntv@users.noreply.github.com>
* chore: drop redundant background repaints so surfaces inherit their parent
Four spots repaint the exact color their parent surface already provides
(bg-white / dark:bg-gray-900 rows inside same-colored pages and modals,
and the selectClass dark repaint inside the connection modals — the
sibling input const is already fully transparent). Visually identical in
stock light and dark; removing them lets instance theming show through
instead of leaving opaque boxes:
- .tiptap tr (app.css) — table rows in notes/editors
- Edit User Group Users tab body rows (common Modal surface)
- AddToolServerModal + AddTerminalServerModal selectClass dark repaint
The matching repaints inside the ModelUsage/UserUsage components are
not part of this change — those files were dead code and were removed
entirely in #27574.
* chore: catch remaining redundant surface repaints missed in the first pass
Same rule as the previous commit — every one of these repaints the exact
color its parent surface already provides, so removal is stock-identical
in light and dark while letting instance theming show through:
- Analytics Dashboard's inline Model Usage / User Activity row markup
(the Analytics tab renders these tables from Dashboard.svelte itself;
the unreferenced ModelUsage/UserUsage component files were removed
in #27574)
- Evaluations Feedbacks + Leaderboard body rows (settings modal surface)
- admin UserList body rows (app page surface)
- chat markdown tables (MarkdownTokens): thead and body rows — unlike
the tiptap header (gray-850 contrast, untouched), this thead painted
the page's own color
- CitationsModal source rows (common Modal surface)
- AddConnectionModal selectClass dark repaint — third copy of the same
const already fixed in AddToolServerModal / AddTerminalServerModal
Since v0.10.0 chat messages are virtualized with content-visibility: auto to skip rendering of off-screen messages. Safari's implementation of content-visibility has known paint bugs (WebKit bugs 277573, 281570 and 283846) that can leave the contents of a message unpainted even when it is on screen. On iOS this makes assistant responses render as empty, both in Safari and as a PWA, while the same chats render fine in Chromium and Firefox. This matches the regression window reported in #26712, which appeared when upgrading from 0.9.6 to 0.10.2.
Detect Safari (including all iOS browsers, which use WebKit) with the same user agent check already used in MessageInput and ShareChatModal, and skip the virtualization class there. Safari falls back to rendering all messages like before v0.10.0, while other engines keep the optimization. Verified with a spoofed Safari user agent that messages render without the virtualization class and with content-visibility resolving to visible, while Chromium keeps content-visibility: auto.
Fixes#26712
