CVE-2026-43734
WebKit: Processing maliciously crafted web content may lead to an unexpected process crash
CVE-2026-43734 is fixed in 21 products on 2 platforms, first by Tahoe 26.5.2, released June 29, 2026. It is not reported as exploited. Patch Radar priority: High.
HighFixed on 2 platforms
CVSS
9.6
MEDIUM
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0039
33rd percentile
A use-after-free issue was addressed with improved memory management. WebKit Bugzilla: 313693
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| macOS | |||
| Tahoe | 26.5.2 | Tahoe 26.5.2 | Jun 29, 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 | Sep 3, 2026 |
| 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 | Aug 20, 2026 |
| 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 | Sep 3, 2026 |
| 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 | Aug 20, 2026 |
| 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 | Sep 3, 2026 |
| 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 | Aug 20, 2026 |
| 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 | Sep 3, 2026 |
| 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 | Aug 20, 2026 |
| 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 | Sep 3, 2026 |
| 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 | Sep 3, 2026 |
| 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 | Aug 20, 2026 |
| 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 | Sep 3, 2026 |
| 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 | Aug 20, 2026 |
| libjavascriptcoregtk-bin · Ubuntu 24.04.5 LTS (noble) | 2.52.6-0ubuntu0.24.04.1 | libjavascriptcoregtk-bin 2.52.6-0ubuntu0.24.04.1 | Sep 3, 2026 |
| libjavascriptcoregtk-bin · Ubuntu 26.04.1 LTS (resolute) | 2.52.6-0ubuntu0.26.04.1 | libjavascriptcoregtk-bin 2.52.6-0ubuntu0.26.04.1 | Aug 20, 2026 |
| 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 | Sep 3, 2026 |
| 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 | Aug 20, 2026 |
| 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 | Sep 3, 2026 |
| 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 | Aug 20, 2026 |
| webkit2gtk · Debian 13.5 (trixie) | 2.52.5-1~deb13u1 | DEBIAN-CVE-2026-43734 | Jul 19, 2026 |
| webkit2gtk · Debian 14 | 2.52.5-1 | DEBIAN-CVE-2026-43734 | Jul 19, 2026 |
| webkit2gtk-driver · Ubuntu 24.04.5 LTS (noble) | 2.52.6-0ubuntu0.24.04.1 | webkit2gtk-driver 2.52.6-0ubuntu0.24.04.1 | Sep 3, 2026 |
| webkit2gtk3 · RHEL 8 | 0:2.54.0-1.el8_10 | RHSA-2026:74084 | Jul 21, 2026 |
| webkit2gtk3 · RHEL 9 | 0:2.52.5-1.el9_8 | RHSA-2026:42062 | Jul 21, 2026 |
| webkit2gtk3 · almalinux 8 | 2.54.0-1.el8_10 | ALSA-2026:74084 | Sep 30, 2026 |
| webkit2gtk3 · almalinux 9 | 2.52.5-1.el9_8 | ALSA-2026:42062 | Jul 20, 2026 |
| webkit2gtk3 · ol 8 | 0:2.52.5-1.el8_10 | ELSA-2026-42088 | Jul 20, 2026 |
| webkit2gtk3 · ol 9 | 0:2.52.5-1.el9_8 | ELSA-2026-42062 | Jul 20, 2026 |
| webkit2gtk3 · opensuse-leap 16.0 | 2.52.5-160000.1.1 | OPENSUSE-SU-2026:21508-1 | Aug 1, 2026 |
| webkit2gtk3 · rocky 8 | 0:2.54.0-1.el8_10 | RLSA-2026:74084 | Oct 1, 2026 |
| webkit2gtk3 · rocky 9 | 0:2.52.5-1.el9_8 | RLSA-2026:42062 | Jul 22, 2026 |
| webkit2gtk3 · sles 15.6 | 2.52.5-150600.12.71.1 | SUSE-SU-2026:3338-1 | Jul 28, 2026 |
| webkit2gtk3 · sles 15.7 | 2.52.5-150600.12.71.1 | SUSE-SU-2026:3338-1 | Jul 28, 2026 |
| webkit2gtk3 · sles 16.0 | 2.52.5-160000.1.1 | SUSE-SU-2026:23133-1 | Aug 1, 2026 |
| webkit2gtk3-devel · RHEL 8 | 0:2.54.0-1.el8_10 | RHSA-2026:74084 | Jul 21, 2026 |
| webkit2gtk3-devel · RHEL 9 | 0:2.52.5-1.el9_8 | RHSA-2026:42062 | Jul 21, 2026 |
| webkit2gtk3-devel · almalinux 8 | 2.54.0-1.el8_10 | ALSA-2026:74084 | Sep 30, 2026 |
| webkit2gtk3-devel · almalinux 9 | 2.52.5-1.el9_8 | ALSA-2026:42062 | Jul 20, 2026 |
| webkit2gtk3-devel · ol 8 | 0:2.52.5-1.el8_10 | ELSA-2026-42088 | Jul 20, 2026 |
| webkit2gtk3-devel · ol 9 | 0:2.52.5-1.el9_8 | ELSA-2026-42062 | Jul 20, 2026 |
| webkit2gtk3-jsc · RHEL 8 | 0:2.54.0-1.el8_10 | RHSA-2026:74084 | Jul 21, 2026 |
| webkit2gtk3-jsc · RHEL 9 | 0:2.52.5-1.el9_8 | RHSA-2026:42062 | Jul 21, 2026 |
| webkit2gtk3-jsc · almalinux 8 | 2.54.0-1.el8_10 | ALSA-2026:74084 | Sep 30, 2026 |
| webkit2gtk3-jsc · almalinux 9 | 2.52.5-1.el9_8 | ALSA-2026:42062 | Jul 20, 2026 |
| webkit2gtk3-jsc · ol 8 | 0:2.52.5-1.el8_10 | ELSA-2026-42088 | Jul 20, 2026 |
| webkit2gtk3-jsc · ol 9 | 0:2.52.5-1.el9_8 | ELSA-2026-42062 | Jul 20, 2026 |
| webkit2gtk3-jsc-devel · RHEL 8 | 0:2.54.0-1.el8_10 | RHSA-2026:74084 | Jul 21, 2026 |
| webkit2gtk3-jsc-devel · RHEL 9 | 0:2.52.5-1.el9_8 | RHSA-2026:42062 | Jul 21, 2026 |
| webkit2gtk3-jsc-devel · almalinux 8 | 2.54.0-1.el8_10 | ALSA-2026:74084 | Sep 30, 2026 |
| webkit2gtk3-jsc-devel · almalinux 9 | 2.52.5-1.el9_8 | ALSA-2026:42062 | Jul 20, 2026 |
| webkit2gtk3-jsc-devel · ol 8 | 0:2.52.5-1.el8_10 | ELSA-2026-42088 | Jul 20, 2026 |
| webkit2gtk3-jsc-devel · ol 9 | 0:2.52.5-1.el9_8 | ELSA-2026-42062 | Jul 20, 2026 |
| webkit2gtk3-soup2 · opensuse-leap 16.0 | 2.52.5-160000.1.1 | OPENSUSE-SU-2026:21508-1 | Aug 1, 2026 |
| webkit2gtk3-soup2 · sles 15.6 | 2.52.5-150600.12.71.1 | SUSE-SU-2026:3338-1 | Jul 28, 2026 |
| webkit2gtk3-soup2 · sles 15.7 | 2.52.5-150600.12.71.1 | SUSE-SU-2026:3338-1 | Jul 28, 2026 |
| webkit2gtk4 · opensuse-leap 16.0 | 2.52.5-160000.1.1 | OPENSUSE-SU-2026:21508-1 | Aug 1, 2026 |
| webkit2gtk4 · sles 15.6 | 2.52.5-150600.12.71.1 | SUSE-SU-2026:3338-1 | Jul 28, 2026 |
| webkit2gtk4 · sles 15.7 | 2.52.5-150600.12.71.1 | SUSE-SU-2026:3338-1 | Jul 28, 2026 |
| webkit2gtk4 · sles 16.0 | 2.52.5-160000.1.1 | SUSE-SU-2026:23133-1 | Aug 1, 2026 |
| webkitgtk-webdriver · Ubuntu 26.04.1 LTS (resolute) | 2.52.6-0ubuntu0.26.04.1 | webkitgtk-webdriver 2.52.6-0ubuntu0.26.04.1 | Aug 20, 2026 |
| wpewebkit · Debian 14 | 2.52.5-1 | DEBIAN-CVE-2026-43734 | Jul 19, 2026 |
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