RHSA-2026:27728 - 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-2026-28946)
• webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-28847)
• webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-28883)
• webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-28901)
• webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-28902)
• webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-28903)
• webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-28904)
• webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-28905)
• webkitgtk: Processing maliciously crafted web content may prevent Content Security Policy from being enforced (CVE-2026-28907)
• webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash (CVE-2026-28942)
• webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash (CVE-2026-28947)
• webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-28953)
• webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash (CVE-2026-28955)
• webkitgtk: An app may be able to access sensitive user data (CVE-2026-28958)
• webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash (CVE-2026-43658)
• webkitgtk: Processing maliciously crafted web content may prevent Content Security Policy from being enforced (CVE-2026-43660)

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 - 2471790 - CVE-2026-28946 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash
• BZ - 2483955 - CVE-2026-28847 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
• BZ - 2483956 - CVE-2026-28883 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
• BZ - 2483957 - CVE-2026-28901 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
• BZ - 2483958 - CVE-2026-28902 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
• BZ - 2483959 - CVE-2026-28903 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
• BZ - 2483960 - CVE-2026-28904 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
• BZ - 2483961 - CVE-2026-28905 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
• BZ - 2483962 - CVE-2026-28907 webkitgtk: Processing maliciously crafted web content may prevent Content Security Policy from being enforced
• BZ - 2483963 - CVE-2026-28942 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash
• BZ - 2483964 - CVE-2026-28947 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash
• BZ - 2483965 - CVE-2026-28953 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
• BZ - 2483966 - CVE-2026-28955 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
• BZ - 2483967 - CVE-2026-28958 webkitgtk: An app may be able to access sensitive user data
• BZ - 2483968 - CVE-2026-43658 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash
• BZ - 2483969 - CVE-2026-43660 webkitgtk: Processing maliciously crafted web content may prevent Content Security Policy from being enforced

CVEs

• CVE-2026-28847
• CVE-2026-28883
• CVE-2026-28901
• CVE-2026-28902
• CVE-2026-28903
• CVE-2026-28904
• CVE-2026-28905
• CVE-2026-28907
• CVE-2026-28942
• CVE-2026-28946
• CVE-2026-28947
• CVE-2026-28953
• CVE-2026-28955
• CVE-2026-28958
• CVE-2026-43658
• CVE-2026-43660

References

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