# CVE-2026-78956: Chromium: CVE-2026-78956 Type confusion in V8

CVE-2026-78956 is fixed in 9 products on 3 platforms, first by Google Chrome Dev (EXE) 153.0.7979.3, released July 31, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-78956
- Priority: High
- CVSS: 8.8 (high)
- EPSS: 0.0045
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 25, 2026
- Weakness: CWE-843: Type confusion
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78956

## Description

<p>This CVE was assigned by Chrome.  Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see <a href="https://chromereleases.googleblog.com/2026">Google Chrome Releases</a> for more information.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Google Chrome (EXE) | 152.0.7977.65 | [Google Chrome (EXE) 152.0.7977.65](https://patchblox.com/security/data/fix/windows-app/google.chrome.exe-152.0.7977.65.md) | Aug 25, 2026 |
| Windows apps | Google Chrome Beta (EXE) | 153.0.8010.5 | [Google Chrome Beta (EXE) 153.0.8010.5](https://patchblox.com/security/data/fix/windows-app/google.chrome.beta.exe-153.0.8010.5.md) | Aug 20, 2026 |
| Windows apps | Google Chrome Dev (EXE) | 153.0.7979.3 | [Google Chrome Dev (EXE) 153.0.7979.3](https://patchblox.com/security/data/fix/windows-app/google.chrome.dev.exe-153.0.7979.3.md) | Jul 31, 2026 |
| Windows apps | Microsoft Edge | 152.0.4191.66 | [Microsoft Edge 152.0.4191.66](https://patchblox.com/security/data/fix/windows-app/microsoft.edge-152.0.4191.66.md) | Sep 4, 2026 |
| Windows apps | Microsoft Edge Beta | 153.0.4234.6 | [Microsoft Edge Beta 153.0.4234.6](https://patchblox.com/security/data/fix/windows-app/microsoft.edge.beta-153.0.4234.6.md) | Aug 27, 2026 |
| Windows apps | Microsoft Edge Dev | 153.0.4224.0 | [Microsoft Edge Dev 153.0.4224.0](https://patchblox.com/security/data/fix/windows-app/microsoft.edge.dev-153.0.4224.0.md) | Aug 17, 2026 |
| Windows apps | Microsoft Edge WebView2 Runtime | 152.0.4191.53 | [Microsoft Edge WebView2 Runtime 152.0.4191.53](https://patchblox.com/security/data/fix/windows-app/microsoft.edgewebview2runtime-152.0.4191.53.md) | Aug 28, 2026 |
| macOS | Google Chrome | 152.0.7977.65 | [Google Chrome 152.0.7977.65](https://patchblox.com/security/data/fix/macos/com.google.chrome-152.0.7977.65.md) | Aug 24, 2026 |
| macOS | Microsoft Edge | 152.0.4191.53 | [Microsoft Edge 152.0.4191.53](https://patchblox.com/security/data/fix/macos/com.microsoft.edgemac-152.0.4191.53.md) | Aug 27, 2026 |
| Linux | chromium Debian 12.15 (bookworm) | 152.0.7977.75-1~deb12u1 | [DEBIAN-CVE-2026-78956](https://patchblox.com/security/data/fix/linux/debian-cve-2026-78956.md) | Sep 4, 2026 |
| Linux | chromium Debian 13.5 (trixie) | 152.0.7977.75-1~deb13u1 | [DEBIAN-CVE-2026-78956](https://patchblox.com/security/data/fix/linux/debian-cve-2026-78956.md) | Sep 4, 2026 |
| Linux | chromium Debian 14 | 152.0.7977.64-1 | [DEBIAN-CVE-2026-78956](https://patchblox.com/security/data/fix/linux/debian-cve-2026-78956.md) | Sep 4, 2026 |
| Linux | chromium opensuse-leap 16.0 | 152.0.7977.82-bp160.1.1 | [OPENSUSE-SU-2026:21799-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21799-1.md) | Nov 7, 2026 |

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Data as of 2026-11-07T18:46:35Z 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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