Copilot Chat (Microsoft Edge) Information Disclosure Vulnerability
CVE-2026-58616 is fixed in 4 products on 2 platforms, first by Microsoft Edge Dev 153.0.4224.0, released August 17, 2026. 1 other affected product has no fix yet. It is not reported as exploited. Patch Radar priority: Routine.
<p>Concurrent execution using shared resource with improper synchronization ('race condition') in Copilot Chat (Microsoft Edge) allows an authorized attacker to disclose information over a network.</p>
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Microsoft Edge | 152.0.4191.66 | Microsoft Edge 152.0.4191.66 | Sep 4, 2026 |
| Microsoft Edge Beta | 153.0.4234.6 | Microsoft Edge Beta 153.0.4234.6 | Aug 27, 2026 |
| Microsoft Edge Dev | 153.0.4224.0 | Microsoft Edge Dev 153.0.4224.0 | Aug 17, 2026 |
| Microsoft Edge WebView2 Runtime | 152.0.4191.53 | Microsoft Edge WebView2 Runtime 152.0.4191.53 | Aug 28, 2026 |
| macOS | |||
| Microsoft Edge | 152.0.4191.53 | Microsoft Edge 152.0.4191.53 | Aug 27, 2026 |
| No fix yet | |||
| Local Administrator Password Solution (Windows apps) | No fix yet | no-fix | n/a |
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