LotusGuild/cinny-desktop
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fix(security): tighten the webview CSP (was fully open)

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script-src drops unsafe-inline/blob/data/http/https (any-origin script exec is
gone); the single inline shim in index.html is hash-pinned; object-src 'none',
base-uri 'self'. Kept deliberately: 'unsafe-eval' (the window.eval native→web
bridge + crypto wasm), broad connect-src (arbitrary homeservers), http: in
img/media (plain-http homeservers), and review-added allowances for Google
Fonts (VT323) and the OpenStreetMap location iframe.

NEEDS RUNTIME SMOKE ON WINDOWS before release (CI can't catch CSP breakage):
boot, avatars/media, VT323 renders, location map embeds, calls connect, deep
links navigate.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Jared Vititoe
2026-07-02 00:21:55 -04:00
parent f883781c1f
commit 706b02545d
1 changed files with 2 additions and 1 deletions
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src-tauri/tauri.conf.json
+2 -1
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@@ -70,7 +70,8 @@
}, },
"app": { "app": {
"security": { "security": {
"csp": "default-src 'self' blob: data: filesystem: ws: wss: http: https: tauri:; script-src 'self' 'unsafe-eval' 'unsafe-inline' blob: data: filesystem: ws: wss: http: https: tauri:; style-src 'self' 'unsafe-inline' blob: data: filesystem: http: https:; img-src 'self' data: blob: filesystem: http: https:; media-src 'self' blob: data: mediastream:; connect-src 'self' blob: ipc: ws: wss: http: https: http://ipc.localhost" "__csp_notes": "Tightened from the fully-open policy (audit 2026-07). script-src: 'unsafe-eval' MUST stay — the native→web bridge (forward_deeplink/emit_to_web) uses window.eval, which page CSP governs (also covers the crypto wasm). The sha256 hash allows the single inline `window.global ||= window;` shim in cinny's index.html (line ~96) — if that snippet or its indentation changes, recompute the hash or the shim is silently blocked. connect-src stays broad: users connect to arbitrary homeservers (img/media keep http: for plain-http homeservers, matching connect-src). Review-added allowances: Google Fonts (VT323 stylesheet+font in index.html) and the OpenStreetMap embed iframe (m.location messages). style-src keeps 'unsafe-inline' for React style attributes.",
"csp": "default-src 'self'; script-src 'self' 'unsafe-eval' 'sha256-dT6noyex1I8o5CS9Sx/y8UOqwpZYIridpGz92gcObIM='; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: blob: http: https:; media-src 'self' blob: data: mediastream: http: https:; worker-src 'self' blob:; frame-src 'self' blob: https://www.openstreetmap.org; connect-src 'self' blob: data: ipc: ws: wss: http: https: http://ipc.localhost; object-src 'none'; base-uri 'self'"
} }
} }
} }