# CVE-2026-43670: WebKit: Processing maliciously crafted web content may bypass Content Security Policy

CVE-2026-43670 is fixed in 6 products on 2 platforms, first by Tahoe 26.5, released May 11, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-43670
- Priority: High
- CVSS: 8.8 (HIGH)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 11, 2026
- Vendor advisory: https://support.apple.com/en-us/127115

## Description

A Content Security Policy bypass was addressed with improved enforcement in AudioWorklet contexts. WebKit Bugzilla: 309004

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| macOS | Tahoe | 26.5 | [Tahoe 26.5](https://patchblox.com/security/data/fix/macos/tahoe-26.5.md) | May 11, 2026 |
| Linux | webkit2gtk Debian 13.5 (trixie) | 2.54.0-1~deb13u1 | [DEBIAN-CVE-2026-43670](https://patchblox.com/security/data/fix/linux/debian-cve-2026-43670.md) | Aug 25, 2026 |
| Linux | webkit2gtk3 opensuse-leap 16.0 | 2.54.1-160000.1.1 | [OPENSUSE-SU-2026:22076-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22076-1.md) | Nov 7, 2026 |
| Linux | webkit2gtk3 sles 15.6 | 2.54.1-150600.12.81.3 | [SUSE-SU-2026:4858-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4858-1.md) | Nov 7, 2026 |
| Linux | webkit2gtk3 sles 15.7 | 2.54.1-150600.12.81.3 | [SUSE-SU-2026:4858-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4858-1.md) | Nov 7, 2026 |
| Linux | webkit2gtk3 sles 16.0 | 2.54.1-160000.1.1 | [SUSE-SU-2026:24225-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24225-1.md) | Nov 7, 2026 |
| Linux | webkit2gtk3-soup2 opensuse-leap 16.0 | 2.54.1-160000.1.1 | [OPENSUSE-SU-2026:22076-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22076-1.md) | Nov 7, 2026 |
| Linux | webkit2gtk3-soup2 sles 15.6 | 2.54.1-150600.12.81.4 | [SUSE-SU-2026:4858-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4858-1.md) | Nov 7, 2026 |
| Linux | webkit2gtk3-soup2 sles 15.7 | 2.54.1-150600.12.81.4 | [SUSE-SU-2026:4858-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4858-1.md) | Nov 7, 2026 |
| Linux | webkit2gtk4 opensuse-leap 16.0 | 2.54.1-160000.1.1 | [OPENSUSE-SU-2026:22076-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22076-1.md) | Nov 7, 2026 |
| Linux | webkit2gtk4 sles 15.6 | 2.54.1-150600.12.81.4 | [SUSE-SU-2026:4858-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4858-1.md) | Nov 7, 2026 |
| Linux | webkit2gtk4 sles 15.7 | 2.54.1-150600.12.81.4 | [SUSE-SU-2026:4858-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4858-1.md) | Nov 7, 2026 |
| Linux | webkit2gtk4 sles 16.0 | 2.54.1-160000.1.1 | [SUSE-SU-2026:24225-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24225-1.md) | Nov 7, 2026 |
| Linux | wpewebkit Debian 14 | 2.54.0-1 | [DEBIAN-CVE-2026-43670](https://patchblox.com/security/data/fix/linux/debian-cve-2026-43670.md) | Aug 25, 2026 |

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Data as of 2026-11-08T13:06:02Z 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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