# CVE-2026-43660: WebKit: Processing maliciously crafted web content may prevent Content Security Policy from being enforced

CVE-2026-43660 is fixed in 21 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-2026-43660
- Priority: High
- CVSS: 8.8 (HIGH)
- EPSS: 0.0027
- 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 validation issue was addressed with improved logic. WebKit Bugzilla: 308906

## 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 | gir1.2-javascriptcoregtk-4.1 Ubuntu 24.04.5 LTS (noble) | 2.52.6-0ubuntu0.24.04.1 | [gir1.2-javascriptcoregtk-4.1 2.52.6-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gir1.2-javascriptcoregtk-4.1-2.52.6-0ubuntu0.24.04.1.md) | Sep 3, 2026 |
| Linux | gir1.2-javascriptcoregtk-4.1 Ubuntu 26.04.1 LTS (resolute) | 2.52.6-0ubuntu0.26.04.1 | [gir1.2-javascriptcoregtk-4.1 2.52.6-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gir1.2-javascriptcoregtk-4.1-2.52.6-0ubuntu0.26.04.1.md) | Aug 20, 2026 |
| Linux | gir1.2-javascriptcoregtk-6.0 Ubuntu 24.04.5 LTS (noble) | 2.52.6-0ubuntu0.24.04.1 | [gir1.2-javascriptcoregtk-6.0 2.52.6-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gir1.2-javascriptcoregtk-6.0-2.52.6-0ubuntu0.24.04.1.md) | Sep 3, 2026 |
| Linux | gir1.2-javascriptcoregtk-6.0 Ubuntu 26.04.1 LTS (resolute) | 2.52.6-0ubuntu0.26.04.1 | [gir1.2-javascriptcoregtk-6.0 2.52.6-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gir1.2-javascriptcoregtk-6.0-2.52.6-0ubuntu0.26.04.1.md) | Aug 20, 2026 |
| Linux | gir1.2-webkit-6.0 Ubuntu 24.04.5 LTS (noble) | 2.52.6-0ubuntu0.24.04.1 | [gir1.2-webkit-6.0 2.52.6-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gir1.2-webkit-6.0-2.52.6-0ubuntu0.24.04.1.md) | Sep 3, 2026 |
| Linux | gir1.2-webkit-6.0 Ubuntu 26.04.1 LTS (resolute) | 2.52.6-0ubuntu0.26.04.1 | [gir1.2-webkit-6.0 2.52.6-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gir1.2-webkit-6.0-2.52.6-0ubuntu0.26.04.1.md) | Aug 20, 2026 |
| Linux | gir1.2-webkit2-4.1 Ubuntu 24.04.5 LTS (noble) | 2.52.6-0ubuntu0.24.04.1 | [gir1.2-webkit2-4.1 2.52.6-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gir1.2-webkit2-4.1-2.52.6-0ubuntu0.24.04.1.md) | Sep 3, 2026 |
| Linux | gir1.2-webkit2-4.1 Ubuntu 26.04.1 LTS (resolute) | 2.52.6-0ubuntu0.26.04.1 | [gir1.2-webkit2-4.1 2.52.6-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gir1.2-webkit2-4.1-2.52.6-0ubuntu0.26.04.1.md) | Aug 20, 2026 |
| Linux | libjavascriptcoregtk-4.0-bin Ubuntu 24.04.5 LTS (noble) | 2.52.6-0ubuntu0.24.04.1 | [libjavascriptcoregtk-4.0-bin 2.52.6-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libjavascriptcoregtk-4.0-bin-2.52.6-0ubuntu0.24.04.1.md) | Sep 3, 2026 |
| Linux | libjavascriptcoregtk-4.1-0 Ubuntu 24.04.5 LTS (noble) | 2.52.6-0ubuntu0.24.04.1 | [libjavascriptcoregtk-4.1-0 2.52.6-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libjavascriptcoregtk-4.1-0-2.52.6-0ubuntu0.24.04.1.md) | Sep 3, 2026 |
| Linux | libjavascriptcoregtk-4.1-0 Ubuntu 26.04.1 LTS (resolute) | 2.52.6-0ubuntu0.26.04.1 | [libjavascriptcoregtk-4.1-0 2.52.6-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libjavascriptcoregtk-4.1-0-2.52.6-0ubuntu0.26.04.1.md) | Aug 20, 2026 |
| Linux | libjavascriptcoregtk-6.0-1 Ubuntu 24.04.5 LTS (noble) | 2.52.6-0ubuntu0.24.04.1 | [libjavascriptcoregtk-6.0-1 2.52.6-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libjavascriptcoregtk-6.0-1-2.52.6-0ubuntu0.24.04.1.md) | Sep 3, 2026 |
| Linux | libjavascriptcoregtk-6.0-1 Ubuntu 26.04.1 LTS (resolute) | 2.52.6-0ubuntu0.26.04.1 | [libjavascriptcoregtk-6.0-1 2.52.6-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libjavascriptcoregtk-6.0-1-2.52.6-0ubuntu0.26.04.1.md) | Aug 20, 2026 |
| Linux | libjavascriptcoregtk-bin Ubuntu 24.04.5 LTS (noble) | 2.52.6-0ubuntu0.24.04.1 | [libjavascriptcoregtk-bin 2.52.6-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libjavascriptcoregtk-bin-2.52.6-0ubuntu0.24.04.1.md) | Sep 3, 2026 |
| Linux | libjavascriptcoregtk-bin Ubuntu 26.04.1 LTS (resolute) | 2.52.6-0ubuntu0.26.04.1 | [libjavascriptcoregtk-bin 2.52.6-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libjavascriptcoregtk-bin-2.52.6-0ubuntu0.26.04.1.md) | Aug 20, 2026 |
| Linux | libwebkit2gtk-4.1-0 Ubuntu 24.04.5 LTS (noble) | 2.52.6-0ubuntu0.24.04.1 | [libwebkit2gtk-4.1-0 2.52.6-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libwebkit2gtk-4.1-0-2.52.6-0ubuntu0.24.04.1.md) | Sep 3, 2026 |
| Linux | libwebkit2gtk-4.1-0 Ubuntu 26.04.1 LTS (resolute) | 2.52.6-0ubuntu0.26.04.1 | [libwebkit2gtk-4.1-0 2.52.6-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libwebkit2gtk-4.1-0-2.52.6-0ubuntu0.26.04.1.md) | Aug 20, 2026 |
| Linux | libwebkitgtk-6.0-4 Ubuntu 24.04.5 LTS (noble) | 2.52.6-0ubuntu0.24.04.1 | [libwebkitgtk-6.0-4 2.52.6-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libwebkitgtk-6.0-4-2.52.6-0ubuntu0.24.04.1.md) | Sep 3, 2026 |
| Linux | libwebkitgtk-6.0-4 Ubuntu 26.04.1 LTS (resolute) | 2.52.6-0ubuntu0.26.04.1 | [libwebkitgtk-6.0-4 2.52.6-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libwebkitgtk-6.0-4-2.52.6-0ubuntu0.26.04.1.md) | Aug 20, 2026 |
| Linux | webkit2gtk Debian 13.5 (trixie) | 2.52.5-1~deb13u1 | [DEBIAN-CVE-2026-43660](https://patchblox.com/security/data/fix/linux/debian-cve-2026-43660.md) | May 11, 2026 |
| Linux | webkit2gtk Debian 14 | 2.52.4-1 | [DEBIAN-CVE-2026-43660](https://patchblox.com/security/data/fix/linux/debian-cve-2026-43660.md) | May 11, 2026 |
| Linux | webkit2gtk-driver Ubuntu 24.04.5 LTS (noble) | 2.52.6-0ubuntu0.24.04.1 | [webkit2gtk-driver 2.52.6-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-webkit2gtk-driver-2.52.6-0ubuntu0.24.04.1.md) | Sep 3, 2026 |
| Linux | webkit2gtk3 RHEL 8 | 0:2.52.4-1.el8_10 | [RHSA-2026:25918](https://patchblox.com/security/data/fix/linux/rhsa-2026-25918.md) | Jun 24, 2026 |
| Linux | webkit2gtk3 RHEL 9 | 0:2.52.4-1.el9_8 | [RHSA-2026:25927](https://patchblox.com/security/data/fix/linux/rhsa-2026-25927.md) | Jun 24, 2026 |
| Linux | webkit2gtk3 almalinux 8 | 2.52.4-1.el8_10 | [ALSA-2026:25918](https://patchblox.com/security/data/fix/linux/alsa-2026-25918.md) | Jun 15, 2026 |
| Linux | webkit2gtk3 almalinux 9 | 2.52.4-1.el9_8 | [ALSA-2026:25927](https://patchblox.com/security/data/fix/linux/alsa-2026-25927.md) | Jun 15, 2026 |
| Linux | webkit2gtk3 ol 8 | 0:2.52.4-1.el8_10 | [ELSA-2026-25918](https://patchblox.com/security/data/fix/linux/elsa-2026-25918.md) | Jun 15, 2026 |
| Linux | webkit2gtk3 ol 9 | 0:2.52.4-1.el9_8 | [ELSA-2026-25927](https://patchblox.com/security/data/fix/linux/elsa-2026-25927.md) | Jun 23, 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 rocky 8 | 0:2.52.4-1.el8_10 | [RLSA-2026:25918](https://patchblox.com/security/data/fix/linux/rlsa-2026-25918.md) | Jun 17, 2026 |
| Linux | webkit2gtk3 rocky 9 | 0:2.52.4-1.el9_8 | [RLSA-2026:25927](https://patchblox.com/security/data/fix/linux/rlsa-2026-25927.md) | Jun 17, 2026 |
| Linux | webkit2gtk3 sles 15.6 | 2.52.4-150600.12.68.1 | [SUSE-SU-2026:2376-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2376-1.md) | Jun 11, 2026 |
| Linux | webkit2gtk3 sles 15.7 | 2.52.4-150600.12.68.1 | [SUSE-SU-2026:2376-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2376-1.md) | Jun 11, 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-devel RHEL 8 | 0:2.52.4-1.el8_10 | [RHSA-2026:25918](https://patchblox.com/security/data/fix/linux/rhsa-2026-25918.md) | Jun 24, 2026 |
| Linux | webkit2gtk3-devel RHEL 9 | 0:2.52.4-1.el9_8 | [RHSA-2026:25927](https://patchblox.com/security/data/fix/linux/rhsa-2026-25927.md) | Jun 24, 2026 |
| Linux | webkit2gtk3-devel almalinux 8 | 2.52.4-1.el8_10 | [ALSA-2026:25918](https://patchblox.com/security/data/fix/linux/alsa-2026-25918.md) | Jun 15, 2026 |
| Linux | webkit2gtk3-devel almalinux 9 | 2.52.4-1.el9_8 | [ALSA-2026:25927](https://patchblox.com/security/data/fix/linux/alsa-2026-25927.md) | Jun 15, 2026 |
| Linux | webkit2gtk3-devel ol 8 | 0:2.52.4-1.el8_10 | [ELSA-2026-25918](https://patchblox.com/security/data/fix/linux/elsa-2026-25918.md) | Jun 15, 2026 |
| Linux | webkit2gtk3-devel ol 9 | 0:2.52.4-1.el9_8 | [ELSA-2026-25927](https://patchblox.com/security/data/fix/linux/elsa-2026-25927.md) | Jun 23, 2026 |
| Linux | webkit2gtk3-jsc RHEL 8 | 0:2.52.4-1.el8_10 | [RHSA-2026:25918](https://patchblox.com/security/data/fix/linux/rhsa-2026-25918.md) | Jun 24, 2026 |
| Linux | webkit2gtk3-jsc RHEL 9 | 0:2.52.4-1.el9_8 | [RHSA-2026:25927](https://patchblox.com/security/data/fix/linux/rhsa-2026-25927.md) | Jun 24, 2026 |
| Linux | webkit2gtk3-jsc almalinux 8 | 2.52.4-1.el8_10 | [ALSA-2026:25918](https://patchblox.com/security/data/fix/linux/alsa-2026-25918.md) | Jun 15, 2026 |
| Linux | webkit2gtk3-jsc almalinux 9 | 2.52.4-1.el9_8 | [ALSA-2026:25927](https://patchblox.com/security/data/fix/linux/alsa-2026-25927.md) | Jun 15, 2026 |
| Linux | webkit2gtk3-jsc ol 8 | 0:2.52.4-1.el8_10 | [ELSA-2026-25918](https://patchblox.com/security/data/fix/linux/elsa-2026-25918.md) | Jun 15, 2026 |
| Linux | webkit2gtk3-jsc ol 9 | 0:2.52.4-1.el9_8 | [ELSA-2026-25927](https://patchblox.com/security/data/fix/linux/elsa-2026-25927.md) | Jun 23, 2026 |
| Linux | webkit2gtk3-jsc-devel RHEL 8 | 0:2.52.4-1.el8_10 | [RHSA-2026:25918](https://patchblox.com/security/data/fix/linux/rhsa-2026-25918.md) | Jun 24, 2026 |
| Linux | webkit2gtk3-jsc-devel RHEL 9 | 0:2.52.4-1.el9_8 | [RHSA-2026:25927](https://patchblox.com/security/data/fix/linux/rhsa-2026-25927.md) | Jun 24, 2026 |
| Linux | webkit2gtk3-jsc-devel almalinux 8 | 2.52.4-1.el8_10 | [ALSA-2026:25918](https://patchblox.com/security/data/fix/linux/alsa-2026-25918.md) | Jun 15, 2026 |
| Linux | webkit2gtk3-jsc-devel almalinux 9 | 2.52.4-1.el9_8 | [ALSA-2026:25927](https://patchblox.com/security/data/fix/linux/alsa-2026-25927.md) | Jun 15, 2026 |
| Linux | webkit2gtk3-jsc-devel ol 8 | 0:2.52.4-1.el8_10 | [ELSA-2026-25918](https://patchblox.com/security/data/fix/linux/elsa-2026-25918.md) | Jun 15, 2026 |
| Linux | webkit2gtk3-jsc-devel ol 9 | 0:2.52.4-1.el9_8 | [ELSA-2026-25927](https://patchblox.com/security/data/fix/linux/elsa-2026-25927.md) | Jun 23, 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 | 2.52.4-150600.12.68.1 | [SUSE-SU-2026:2376-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2376-1.md) | Jun 11, 2026 |
| Linux | webkit2gtk3-soup2 sles 15.7 | 2.52.4-150600.12.68.1 | [SUSE-SU-2026:2376-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2376-1.md) | Jun 11, 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 | 2.52.4-150600.12.68.1 | [SUSE-SU-2026:2376-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2376-1.md) | Jun 11, 2026 |
| Linux | webkit2gtk4 sles 15.7 | 2.52.4-150600.12.68.1 | [SUSE-SU-2026:2376-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2376-1.md) | Jun 11, 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 | webkitgtk-webdriver Ubuntu 26.04.1 LTS (resolute) | 2.52.6-0ubuntu0.26.04.1 | [webkitgtk-webdriver 2.52.6-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-webkitgtk-webdriver-2.52.6-0ubuntu0.26.04.1.md) | Aug 20, 2026 |
| Linux | wpewebkit Debian 14 | 2.52.4-1 | [DEBIAN-CVE-2026-43660](https://patchblox.com/security/data/fix/linux/debian-cve-2026-43660.md) | May 11, 2026 |

---

Data as of 2026-11-08T19:12:23Z 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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