# Microsoft Edge WebView2 Runtime 150.0.4078.83

Microsoft Edge WebView2 Runtime 150.0.4078.83, released July 17, 2026, fixes 16 CVEs in Microsoft Edge WebView2 Runtime. None of them is reported as exploited. Patch Radar priority: Urgent. The latest Microsoft Edge WebView2 Runtime is 157.0.4341.42, which also fixes every one of these CVEs.

- Web page: https://patchblox.com/security/fix/windows-app/microsoft.edgewebview2runtime-150.0.4078.83
- Platform: Windows apps
- Released: Jul 17, 2026
- Priority: Urgent (Closes CVE-2026-15901, rated Critical)
- CVEs: 16, exploited: 0, on CISA KEV: 0
- Superseded by: [Microsoft Edge WebView2 Runtime 157.0.4341.42](https://patchblox.com/security/data/product/windows-app/microsoft-edge-webview2-runtime.md), the latest version, which also fixes every CVE listed here

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Microsoft Edge WebView2 Runtime](https://patchblox.com/security/data/product/windows-app/microsoft-edge-webview2-runtime.md) |  | 150.0.4078.83 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-15773](https://patchblox.com/security/data/cve/CVE-2026-15773.md) | Urgent | Chromium: CVE-2026-15773 Use after free in Core | 9.6 | 0.0035 |  |
| [CVE-2026-15901](https://patchblox.com/security/data/cve/CVE-2026-15901.md) | Urgent | Chromium: CVE-2026-15901 Use after free in Network | 9.6 | 0.0035 |  |
| [CVE-2026-15776](https://patchblox.com/security/data/cve/CVE-2026-15776.md) | High | Chromium: CVE-2026-15776 Type Confusion in V8 | 8.8 | 0.0050 |  |
| [CVE-2026-15767](https://patchblox.com/security/data/cve/CVE-2026-15767.md) | High | Chromium: CVE-2026-15767 Heap buffer overflow in libyuv | 8.8 | 0.0042 |  |
| [CVE-2026-15902](https://patchblox.com/security/data/cve/CVE-2026-15902.md) | High | Chromium: CVE-2026-15902 Use after free in Cast | 8.8 | 0.0041 |  |
| [CVE-2026-15903](https://patchblox.com/security/data/cve/CVE-2026-15903.md) | High | Chromium: CVE-2026-15903 Out of bounds read and write in V8 | 8.8 | 0.0041 |  |
| [CVE-2026-15766](https://patchblox.com/security/data/cve/CVE-2026-15766.md) | High | Chromium: CVE-2026-15766 Uninitialized Use in Skia | 9.6 | 0.0040 |  |
| [CVE-2026-15765](https://patchblox.com/security/data/cve/CVE-2026-15765.md) | High | Chromium: CVE-2026-15765 Use after free in Ozone | 7.5 | 0.0030 |  |
| [CVE-2026-15774](https://patchblox.com/security/data/cve/CVE-2026-15774.md) | High | Chromium: CVE-2026-15774 Use after free in Skia | 9.6 | 0.0029 |  |
| [CVE-2026-15905](https://patchblox.com/security/data/cve/CVE-2026-15905.md) | High | Chromium: CVE-2026-15905 Use after free in Aura | 7.8 | 0.0014 |  |
| [CVE-2026-57980](https://patchblox.com/security/data/cve/CVE-2026-57980.md) | Routine | Microsoft Edge (Chromium-based) Tampering Vulnerability | 5.4 | 0.0039 |  |
| [CVE-2026-15770](https://patchblox.com/security/data/cve/CVE-2026-15770.md) | Routine | Chromium: CVE-2026-15770 Uninitialized Use in V8 | 6.5 | 0.0035 |  |
| [CVE-2026-15771](https://patchblox.com/security/data/cve/CVE-2026-15771.md) | Routine | Chromium: CVE-2026-15771 Insufficient validation of untrusted input in Media | 5.3 | 0.0030 |  |
| [CVE-2026-15778](https://patchblox.com/security/data/cve/CVE-2026-15778.md) | Routine | Chromium: CVE-2026-15778 Insufficient validation of untrusted input in Navigation | 6.5 | 0.0030 |  |
| [CVE-2026-15768](https://patchblox.com/security/data/cve/CVE-2026-15768.md) | Routine | Chromium: CVE-2026-15768 Insufficient policy enforcement in HTML-in-Canvas | 6.5 | 0.0024 |  |
| [CVE-2026-15775](https://patchblox.com/security/data/cve/CVE-2026-15775.md) | Routine | Chromium: CVE-2026-15775 Insufficient policy enforcement in V8 | 6.5 | 0.0024 |  |

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Data as of 2026-11-11T07:45:43Z 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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