RHSA-2026:58564 — Security Advisory

Red Hat Security Advisory: webkitgtk4 security update

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Severity

Important

Red Hat Product Security

RHEL 7

Products

Official CSAF product identity

Published · August 24, 2026

Updated · November 2, 2026

Topic

An update for webkitgtk4 is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

WebKitGTK+ is port of the WebKit portable web rendering engine to the GTK+ platform. These packages provide WebKitGTK+ for GTK+ 3.

Security Fix(es):

Mozilla: Arbitrary JavaScript execution in PDF.js (CVE-2024-4367)
webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash (CVE-2026-39872)
webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash (CVE-2026-43663)
webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash (CVE-2026-43676)
webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash (CVE-2026-43699)
webkitgtk: webkitgtk: A malicious website may process restricted web content outside the sandbox (CVE-2026-43701)
webkitgtk: webkitgtk: Maliciously crafted web content may lead to memory corruption (CVE-2026-43705)
webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash (CVE-2026-43707)
webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash (CVE-2026-43712)
webkitgtk: webkitgtk: Visiting a website may leak sensitive data (CVE-2026-43713)
webkitgtk: webkitgtk: Maliciously crafted web content may lead to memory corruption (CVE-2026-43715)
webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash (CVE-2026-43716)
webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash (CVE-2026-43720)
webkitgtk: webkitgtk: A malicious website may silently hijack clipboard data (CVE-2026-43721)
webkitgtk: webkitgtk: A malicious website may process restricted web content outside the sandbox (CVE-2026-43725)
webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash (CVE-2026-43726)
webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash (CVE-2026-43727)
webkitgtk: webkitgtk: Maliciously crafted web content may lead to memory corruption (CVE-2026-43731)
webkitgtk: webkitgtk: Maliciously crafted web content may disclose sensitive user information (CVE-2026-43732)
webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash (CVE-2026-43734)
webkitgtk: webkitgtk: Maliciously crafted web content may disclose process memory (CVE-2026-43740)
webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash (CVE-2026-43742)
webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash (CVE-2026-43745)
webkitgtk: Processing maliciously crafted web content may lead to an unexpected process termination (CVE-2026-64787)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.