# CVE-2026-121102: Google Chrome: Missing authorization

CVE-2026-121102 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.

- Web page: https://patchblox.com/security/cve/CVE-2026-121102
- Priority: High
- CVSS: 8.8
- EPSS: 0.0026
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 3, 2026
- Weakness: CWE-862: Missing authorization
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-121102

## Description

Missing 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: Medium)

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Google Chrome | 157.0.8103.39 | [Google Chrome 157.0.8103.39](https://patchblox.com/security/data/fix/windows-app/google.chrome-157.0.8103.39.md) | Nov 3, 2026 |
| Windows apps | Google Chrome (EXE) | 157.0.8103.39 | [Google Chrome (EXE) 157.0.8103.39](https://patchblox.com/security/data/fix/windows-app/google.chrome.exe-157.0.8103.39.md) | Nov 3, 2026 |
| Windows apps | Google Chrome Beta (EXE) | 158.0.8127.2 | [Google Chrome Beta (EXE) 158.0.8127.2](https://patchblox.com/security/data/fix/windows-app/google.chrome.beta.exe-158.0.8127.2.md) | Oct 27, 2026 |
| Windows apps | Google Chrome Dev (EXE) | 158.0.8106.0 | [Google Chrome Dev (EXE) 158.0.8106.0](https://patchblox.com/security/data/fix/windows-app/google.chrome.dev.exe-158.0.8106.0.md) | Oct 15, 2026 |
| macOS | Google Chrome | 157.0.8103.39 | [Google Chrome 157.0.8103.39](https://patchblox.com/security/data/fix/macos/com.google.chrome-157.0.8103.39.md) | Nov 2, 2026 |

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Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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