Google Chrome: Incorrect authorization
CVE-2026-121107 is fixed in 4 products on 2 platforms, first by Google Chrome Dev (EXE) 158.0.8106.0, released October 15, 2026. It is not reported as exploited. Patch Radar priority: High.
Incorrect authorization in BackgroundFetch in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: High)
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Google Chrome | 157.0.8103.39 | Google Chrome 157.0.8103.39 | Nov 3, 2026 |
| Google Chrome (EXE) | 157.0.8103.39 | Google Chrome (EXE) 157.0.8103.39 | Nov 3, 2026 |
| Google Chrome Beta (EXE) | 158.0.8127.2 | Google Chrome Beta (EXE) 158.0.8127.2 | Oct 27, 2026 |
| Google Chrome Dev (EXE) | 158.0.8106.0 | Google Chrome Dev (EXE) 158.0.8106.0 | Oct 15, 2026 |
| macOS | |||
| Google Chrome | 157.0.8103.39 | Google Chrome 157.0.8103.39 | Nov 2, 2026 |
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