RHSA-2026:22136 - Security Advisory

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):

• webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash (CVE-2025-43213)
• webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash (CVE-2025-43214)
• webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash (CVE-2025-43457)
• webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2025-43511)
• webkitgtk: Processing maliciously crafted web content may disclose internal states of the app (CVE-2025-46299)
• webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-20608)
• webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-20635)
• webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-20636)
• webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-20644)
• webkitgtk: A remote attacker may be able to cause a denial-of-service (CVE-2026-20652)
• webkitgtk: A website may be able to track users through Safari web extensions (CVE-2026-20676)
• webkitgtk: Processing maliciously crafted web content may bypass Same Origin Policy (CVE-2026-20643)
• webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-20664)
• webkitgtk: Processing maliciously crafted web content may prevent Content Security Policy from being enforced (CVE-2026-20665)
• webkitgtk: A maliciously crafted webpage may be able to fingerprint the user (CVE-2026-20691)
• webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-28857)
• webkitgtk: A malicious website may be able to process restricted web content outside the sandbox (CVE-2026-28859)
• webkitgtk: Visiting a maliciously crafted website may lead to a cross-site scripting attack (CVE-2026-28871)

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.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux Server - Extended Life Cycle Support 7 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 7 s390x
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian 7 ppc64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, little endian 7 ppc64le

Fixes

• BZ - 2448781 - CVE-2025-43213 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash
• BZ - 2448782 - CVE-2025-43214 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash
• BZ - 2448786 - CVE-2025-43457 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash
• BZ - 2448787 - CVE-2025-43511 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
• BZ - 2448788 - CVE-2025-46299 webkitgtk: Processing maliciously crafted web content may disclose internal states of the app
• BZ - 2448789 - CVE-2026-20608 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
• BZ - 2448790 - CVE-2026-20635 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
• BZ - 2448791 - CVE-2026-20636 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
• BZ - 2448792 - CVE-2026-20644 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
• BZ - 2448793 - CVE-2026-20652 webkitgtk: A remote attacker may be able to cause a denial-of-service
• BZ - 2448794 - CVE-2026-20676 webkitgtk: A website may be able to track users through Safari web extensions
• BZ - 2453000 - CVE-2026-20643 webkitgtk: Processing maliciously crafted web content may bypass Same Origin Policy
• BZ - 2453001 - CVE-2026-20664 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
• BZ - 2453002 - CVE-2026-20665 webkitgtk: Processing maliciously crafted web content may prevent Content Security Policy from being enforced
• BZ - 2453003 - CVE-2026-20691 webkitgtk: A maliciously crafted webpage may be able to fingerprint the user
• BZ - 2453004 - CVE-2026-28857 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
• BZ - 2453006 - CVE-2026-28859 webkitgtk: A malicious website may be able to process restricted web content outside the sandbox
• BZ - 2453008 - CVE-2026-28871 webkitgtk: Visiting a maliciously crafted website may lead to a cross-site scripting attack

CVEs

• CVE-2025-43213
• CVE-2025-43214
• CVE-2025-43457
• CVE-2025-43511
• CVE-2025-46299
• CVE-2026-20608
• CVE-2026-20635
• CVE-2026-20636
• CVE-2026-20643
• CVE-2026-20644
• CVE-2026-20652
• CVE-2026-20664
• CVE-2026-20665
• CVE-2026-20676
• CVE-2026-20691
• CVE-2026-28857
• CVE-2026-28859
• CVE-2026-28871

References

• https://access.redhat.com/security/updates/classification/#important