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fix(security): IPv6 ULA blocking, cookie redaction, per-tab cancel, targeted token (#664)

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Community PR #664 by @mr-k-man (security audit round 1, new parts only).

- IPv6 ULA prefix blocking (fc00::/7) in url-validation.ts with false-positive
  guard for hostnames like fd.example.com
- Cookie value redaction for tokens, API keys, JWTs in browse cookies command
- Per-tab cancel files in killAgent() replacing broken global kill-signal
- design/serve.ts: realpathSync upgrade prevents symlink bypass in /api/reload
- extension: targeted getToken handler replaces token-in-health-broadcast
- Supabase migration 003: column-level GRANT restricts anon UPDATE scope
- Telemetry sync: upsert error logging
- 10 new tests for IPv6, cookie redaction, DNS rebinding, path traversal

Co-Authored-By: mr-k-man <mr-k-man@users.noreply.github.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Garry Tan
2026-04-05 22:58:06 -07:00
parent 5bd05c9e0f
commit c151fabfca
12 changed files with 363 additions and 32 deletions
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extension/background.js
+15 -4
View File
@@ -87,8 +87,8 @@ function setConnected(healthData) {
chrome.action.setBadgeBackgroundColor({ color: '#F59E0B' });
chrome.action.setBadgeText({ text: ' ' });
// Broadcast health to popup and side panel (include token for sidepanel auth)
chrome.runtime.sendMessage({ type: 'health', data: { ...healthData, token: authToken } }).catch((err) => {
// Broadcast health to popup and side panel (token excluded — use getToken message instead)
chrome.runtime.sendMessage({ type: 'health', data: healthData }).catch((err) => {
console.debug('[gstack bg] No listener for health broadcast:', err.message);
});
@@ -285,7 +285,7 @@ chrome.runtime.onMessage.addListener((msg, sender, sendResponse) => {
}
const ALLOWED_TYPES = new Set([
'getPort', 'setPort', 'getServerUrl', 'fetchRefs',
'getPort', 'setPort', 'getServerUrl', 'getToken', 'fetchRefs',
'openSidePanel', 'sidebarOpened', 'command', 'sidebar-command',
// Inspector message types
'startInspector', 'stopInspector', 'elementPicked', 'pickerCancelled',
@@ -315,7 +315,18 @@ chrome.runtime.onMessage.addListener((msg, sender, sendResponse) => {
return true;
}
// getToken handler removed — token distributed via health broadcast
// Token delivered via targeted sendResponse, not broadcast — limits exposure.
// Only respond to extension pages (sidepanel/popup) — content scripts have
// sender.tab set, so reject those to prevent token access from injected contexts.
if (msg.type === 'getToken') {
if (sender.tab) {
console.warn('[gstack] Rejected getToken from content script context');
sendResponse({ token: null });
} else {
sendResponse({ token: authToken });
}
return true;
}
if (msg.type === 'fetchRefs') {
fetchAndRelayRefs().then(() => sendResponse({ ok: true }));