# CVE-2026-28861: WebKit: A malicious website may be able to access script message handlers intended for other origins

CVE-2026-28861 is fixed in 18 products on 2 platforms, first by Tahoe 26.4, released March 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-28861
- Priority: Routine
- CVSS: 4.3 (MEDIUM)
- EPSS: 0.0032
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 24, 2026
- Vendor advisory: https://support.apple.com/en-us/126794

## Description

A logic issue was addressed with improved state management. WebKit Bugzilla: 307014

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| macOS | Tahoe | 26.4 | [Tahoe 26.4](https://patchblox.com/security/data/fix/macos/tahoe-26.4.md) | Mar 24, 2026 |
| Linux | gir1.2-javascriptcoregtk-4.1 Ubuntu 24.04.5 LTS (noble) | 2.52.3-0ubuntu0.24.04.1 | [gir1.2-javascriptcoregtk-4.1 2.52.3-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gir1.2-javascriptcoregtk-4.1-2.52.3-0ubuntu0.24.04.1.md) | Mar 24, 2026 |
| Linux | gir1.2-javascriptcoregtk-4.1 Ubuntu 25.10 (questing) | 2.52.3-0ubuntu0.25.10.1 | [gir1.2-javascriptcoregtk-4.1 2.52.3-0ubuntu0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-gir1.2-javascriptcoregtk-4.1-2.52.3-0ubuntu0.25.10.1.md) | Mar 24, 2026 |
| Linux | gir1.2-javascriptcoregtk-4.1 Ubuntu 26.04.1 LTS (resolute) | 2.52.3-0ubuntu0.26.04.2 | [gir1.2-javascriptcoregtk-4.1 2.52.3-0ubuntu0.26.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gir1.2-javascriptcoregtk-4.1-2.52.3-0ubuntu0.26.04.2.md) | Mar 24, 2026 |
| Linux | gir1.2-javascriptcoregtk-6.0 Ubuntu 24.04.5 LTS (noble) | 2.52.3-0ubuntu0.24.04.1 | [gir1.2-javascriptcoregtk-6.0 2.52.3-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gir1.2-javascriptcoregtk-6.0-2.52.3-0ubuntu0.24.04.1.md) | Mar 24, 2026 |
| Linux | gir1.2-javascriptcoregtk-6.0 Ubuntu 25.10 (questing) | 2.52.3-0ubuntu0.25.10.1 | [gir1.2-javascriptcoregtk-6.0 2.52.3-0ubuntu0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-gir1.2-javascriptcoregtk-6.0-2.52.3-0ubuntu0.25.10.1.md) | Mar 24, 2026 |
| Linux | gir1.2-javascriptcoregtk-6.0 Ubuntu 26.04.1 LTS (resolute) | 2.52.3-0ubuntu0.26.04.2 | [gir1.2-javascriptcoregtk-6.0 2.52.3-0ubuntu0.26.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gir1.2-javascriptcoregtk-6.0-2.52.3-0ubuntu0.26.04.2.md) | Mar 24, 2026 |
| Linux | gir1.2-webkit-6.0 Ubuntu 24.04.5 LTS (noble) | 2.52.3-0ubuntu0.24.04.1 | [gir1.2-webkit-6.0 2.52.3-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gir1.2-webkit-6.0-2.52.3-0ubuntu0.24.04.1.md) | Mar 24, 2026 |
| Linux | gir1.2-webkit-6.0 Ubuntu 25.10 (questing) | 2.52.3-0ubuntu0.25.10.1 | [gir1.2-webkit-6.0 2.52.3-0ubuntu0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-gir1.2-webkit-6.0-2.52.3-0ubuntu0.25.10.1.md) | Mar 24, 2026 |
| Linux | gir1.2-webkit-6.0 Ubuntu 26.04.1 LTS (resolute) | 2.52.3-0ubuntu0.26.04.2 | [gir1.2-webkit-6.0 2.52.3-0ubuntu0.26.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gir1.2-webkit-6.0-2.52.3-0ubuntu0.26.04.2.md) | Mar 24, 2026 |
| Linux | gir1.2-webkit2-4.1 Ubuntu 24.04.5 LTS (noble) | 2.52.3-0ubuntu0.24.04.1 | [gir1.2-webkit2-4.1 2.52.3-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gir1.2-webkit2-4.1-2.52.3-0ubuntu0.24.04.1.md) | Mar 24, 2026 |
| Linux | gir1.2-webkit2-4.1 Ubuntu 25.10 (questing) | 2.52.3-0ubuntu0.25.10.1 | [gir1.2-webkit2-4.1 2.52.3-0ubuntu0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-gir1.2-webkit2-4.1-2.52.3-0ubuntu0.25.10.1.md) | Mar 24, 2026 |
| Linux | gir1.2-webkit2-4.1 Ubuntu 26.04.1 LTS (resolute) | 2.52.3-0ubuntu0.26.04.2 | [gir1.2-webkit2-4.1 2.52.3-0ubuntu0.26.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gir1.2-webkit2-4.1-2.52.3-0ubuntu0.26.04.2.md) | Mar 24, 2026 |
| Linux | libjavascriptcoregtk-4.0-bin Ubuntu 24.04.5 LTS (noble) | 2.52.3-0ubuntu0.24.04.1 | [libjavascriptcoregtk-4.0-bin 2.52.3-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libjavascriptcoregtk-4.0-bin-2.52.3-0ubuntu0.24.04.1.md) | Mar 24, 2026 |
| Linux | libjavascriptcoregtk-4.0-bin Ubuntu 25.10 (questing) | 2.52.3-0ubuntu0.25.10.1 | [libjavascriptcoregtk-4.0-bin 2.52.3-0ubuntu0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libjavascriptcoregtk-4.0-bin-2.52.3-0ubuntu0.25.10.1.md) | Mar 24, 2026 |
| Linux | libjavascriptcoregtk-4.1-0 Ubuntu 24.04.5 LTS (noble) | 2.52.3-0ubuntu0.24.04.1 | [libjavascriptcoregtk-4.1-0 2.52.3-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libjavascriptcoregtk-4.1-0-2.52.3-0ubuntu0.24.04.1.md) | Mar 24, 2026 |
| Linux | libjavascriptcoregtk-4.1-0 Ubuntu 25.10 (questing) | 2.52.3-0ubuntu0.25.10.1 | [libjavascriptcoregtk-4.1-0 2.52.3-0ubuntu0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libjavascriptcoregtk-4.1-0-2.52.3-0ubuntu0.25.10.1.md) | Mar 24, 2026 |
| Linux | libjavascriptcoregtk-4.1-0 Ubuntu 26.04.1 LTS (resolute) | 2.52.3-0ubuntu0.26.04.2 | [libjavascriptcoregtk-4.1-0 2.52.3-0ubuntu0.26.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libjavascriptcoregtk-4.1-0-2.52.3-0ubuntu0.26.04.2.md) | Mar 24, 2026 |
| Linux | libjavascriptcoregtk-6.0-1 Ubuntu 24.04.5 LTS (noble) | 2.52.3-0ubuntu0.24.04.1 | [libjavascriptcoregtk-6.0-1 2.52.3-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libjavascriptcoregtk-6.0-1-2.52.3-0ubuntu0.24.04.1.md) | Mar 24, 2026 |
| Linux | libjavascriptcoregtk-6.0-1 Ubuntu 25.10 (questing) | 2.52.3-0ubuntu0.25.10.1 | [libjavascriptcoregtk-6.0-1 2.52.3-0ubuntu0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libjavascriptcoregtk-6.0-1-2.52.3-0ubuntu0.25.10.1.md) | Mar 24, 2026 |
| Linux | libjavascriptcoregtk-6.0-1 Ubuntu 26.04.1 LTS (resolute) | 2.52.3-0ubuntu0.26.04.2 | [libjavascriptcoregtk-6.0-1 2.52.3-0ubuntu0.26.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libjavascriptcoregtk-6.0-1-2.52.3-0ubuntu0.26.04.2.md) | Mar 24, 2026 |
| Linux | libjavascriptcoregtk-bin Ubuntu 24.04.5 LTS (noble) | 2.52.3-0ubuntu0.24.04.1 | [libjavascriptcoregtk-bin 2.52.3-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libjavascriptcoregtk-bin-2.52.3-0ubuntu0.24.04.1.md) | Mar 24, 2026 |
| Linux | libjavascriptcoregtk-bin Ubuntu 25.10 (questing) | 2.52.3-0ubuntu0.25.10.1 | [libjavascriptcoregtk-bin 2.52.3-0ubuntu0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libjavascriptcoregtk-bin-2.52.3-0ubuntu0.25.10.1.md) | Mar 24, 2026 |
| Linux | libjavascriptcoregtk-bin Ubuntu 26.04.1 LTS (resolute) | 2.52.3-0ubuntu0.26.04.2 | [libjavascriptcoregtk-bin 2.52.3-0ubuntu0.26.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libjavascriptcoregtk-bin-2.52.3-0ubuntu0.26.04.2.md) | Mar 24, 2026 |
| Linux | libwebkit2gtk-4.1-0 Ubuntu 24.04.5 LTS (noble) | 2.52.3-0ubuntu0.24.04.1 | [libwebkit2gtk-4.1-0 2.52.3-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libwebkit2gtk-4.1-0-2.52.3-0ubuntu0.24.04.1.md) | Mar 24, 2026 |
| Linux | libwebkit2gtk-4.1-0 Ubuntu 25.10 (questing) | 2.52.3-0ubuntu0.25.10.1 | [libwebkit2gtk-4.1-0 2.52.3-0ubuntu0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libwebkit2gtk-4.1-0-2.52.3-0ubuntu0.25.10.1.md) | Mar 24, 2026 |
| Linux | libwebkit2gtk-4.1-0 Ubuntu 26.04.1 LTS (resolute) | 2.52.3-0ubuntu0.26.04.2 | [libwebkit2gtk-4.1-0 2.52.3-0ubuntu0.26.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libwebkit2gtk-4.1-0-2.52.3-0ubuntu0.26.04.2.md) | Mar 24, 2026 |
| Linux | libwebkitgtk-6.0-4 Ubuntu 24.04.5 LTS (noble) | 2.52.3-0ubuntu0.24.04.1 | [libwebkitgtk-6.0-4 2.52.3-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libwebkitgtk-6.0-4-2.52.3-0ubuntu0.24.04.1.md) | Mar 24, 2026 |
| Linux | libwebkitgtk-6.0-4 Ubuntu 25.10 (questing) | 2.52.3-0ubuntu0.25.10.1 | [libwebkitgtk-6.0-4 2.52.3-0ubuntu0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libwebkitgtk-6.0-4-2.52.3-0ubuntu0.25.10.1.md) | Mar 24, 2026 |
| Linux | libwebkitgtk-6.0-4 Ubuntu 26.04.1 LTS (resolute) | 2.52.3-0ubuntu0.26.04.2 | [libwebkitgtk-6.0-4 2.52.3-0ubuntu0.26.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libwebkitgtk-6.0-4-2.52.3-0ubuntu0.26.04.2.md) | Mar 24, 2026 |
| Linux | webkit2gtk Debian 13.5 (trixie) | 2.52.3-2~deb13u1 | [DEBIAN-CVE-2026-28861](https://patchblox.com/security/data/fix/linux/debian-cve-2026-28861.md) | Mar 25, 2026 |
| Linux | webkit2gtk Debian 14 | 2.52.1-1 | [DEBIAN-CVE-2026-28861](https://patchblox.com/security/data/fix/linux/debian-cve-2026-28861.md) | Mar 25, 2026 |
| Linux | webkit2gtk-driver Ubuntu 24.04.5 LTS (noble) | 2.52.3-0ubuntu0.24.04.1 | [webkit2gtk-driver 2.52.3-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-webkit2gtk-driver-2.52.3-0ubuntu0.24.04.1.md) | Mar 24, 2026 |
| Linux | webkit2gtk-driver Ubuntu 25.10 (questing) | 2.52.3-0ubuntu0.25.10.1 | [webkit2gtk-driver 2.52.3-0ubuntu0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-webkit2gtk-driver-2.52.3-0ubuntu0.25.10.1.md) | Mar 24, 2026 |
| Linux | webkit2gtk3 opensuse-leap 15.6 | 2.52.1-150600.12.63.1 | [SUSE-SU-2026:1364-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1364-1.md) | Apr 15, 2026 |
| Linux | webkit2gtk3 opensuse-leap 16.0 | 2.52.1-160000.1.1 | [OPENSUSE-SU-2026:20518-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20518-1.md) | Apr 13, 2026 |
| Linux | webkit2gtk3 sles 15.6 | 2.52.1-150600.12.63.1 | [SUSE-SU-2026:1364-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1364-1.md) | Apr 15, 2026 |
| Linux | webkit2gtk3 sles 15.7 | 2.52.1-150600.12.63.1 | [SUSE-SU-2026:1364-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1364-1.md) | Apr 15, 2026 |
| Linux | webkit2gtk3 sles 16.0 | 2.52.1-160000.1.1 | [SUSE-SU-2026:21180-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-21180-1.md) | Apr 13, 2026 |
| Linux | webkit2gtk3-soup2 opensuse-leap 15.6 | 2.52.1-150600.12.63.1 | [SUSE-SU-2026:1364-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1364-1.md) | Apr 15, 2026 |
| Linux | webkit2gtk3-soup2 opensuse-leap 16.0 | 2.52.1-160000.1.1 | [OPENSUSE-SU-2026:20518-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20518-1.md) | Apr 13, 2026 |
| Linux | webkit2gtk3-soup2 sles 15.6 | 2.52.1-150600.12.63.1 | [SUSE-SU-2026:1364-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1364-1.md) | Apr 15, 2026 |
| Linux | webkit2gtk3-soup2 sles 15.7 | 2.52.1-150600.12.63.1 | [SUSE-SU-2026:1364-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1364-1.md) | Apr 15, 2026 |
| Linux | webkit2gtk4 opensuse-leap 15.6 | 2.52.1-150600.12.63.1 | [SUSE-SU-2026:1364-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1364-1.md) | Apr 15, 2026 |
| Linux | webkit2gtk4 opensuse-leap 16.0 | 2.52.1-160000.1.1 | [OPENSUSE-SU-2026:20518-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20518-1.md) | Apr 13, 2026 |
| Linux | webkit2gtk4 sles 15.6 | 2.52.1-150600.12.63.1 | [SUSE-SU-2026:1364-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1364-1.md) | Apr 15, 2026 |
| Linux | webkit2gtk4 sles 15.7 | 2.52.1-150600.12.63.1 | [SUSE-SU-2026:1364-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1364-1.md) | Apr 15, 2026 |
| Linux | webkit2gtk4 sles 16.0 | 2.52.1-160000.1.1 | [SUSE-SU-2026:21180-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-21180-1.md) | Apr 13, 2026 |
| Linux | webkitgtk-webdriver Ubuntu 25.10 (questing) | 2.52.3-0ubuntu0.25.10.1 | [webkitgtk-webdriver 2.52.3-0ubuntu0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-webkitgtk-webdriver-2.52.3-0ubuntu0.25.10.1.md) | Mar 24, 2026 |
| Linux | webkitgtk-webdriver Ubuntu 26.04.1 LTS (resolute) | 2.52.3-0ubuntu0.26.04.2 | [webkitgtk-webdriver 2.52.3-0ubuntu0.26.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-webkitgtk-webdriver-2.52.3-0ubuntu0.26.04.2.md) | Mar 24, 2026 |
| Linux | wpewebkit Debian 14 | 2.52.1-1 | [DEBIAN-CVE-2026-28861](https://patchblox.com/security/data/fix/linux/debian-cve-2026-28861.md) | Mar 25, 2026 |

---

Data as of 2026-11-09T13:31:49Z 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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