RHSA-2026:54634: Important: webkit2gtk3 security update

Published Aug 13, 2026
·
Updated

Important: webkit2gtk3 security update

Other sources

WebKitGTK is the port of the portable web rendering engine WebKit to the GTK platform.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) 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.

— Red Hat

Affected Software

27 affected componentsFixes available
Red Hat Red Hat Enterprise Linux for IBM z Systems - 4 years of updates
Red Hat Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for ARM 64 - 4 years of updates
Red Hat Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions
Red Hat Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Life Cycle
Red Hat Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Red Hat Red Hat Enterprise Linux Server - AUS
redhat/webkit2gtk3<2.52.5-1.el9_4
2.52.5-1.el9_4
redhat/webkit2gtk3<2.52.5-1.el9_4
2.52.5-1.el9_4
redhat/webkit2gtk3-devel<2.52.5-1.el9_4
2.52.5-1.el9_4
redhat/webkit2gtk3-devel<2.52.5-1.el9_4
2.52.5-1.el9_4
redhat/webkit2gtk3-jsc<2.52.5-1.el9_4
2.52.5-1.el9_4
redhat/webkit2gtk3-jsc<2.52.5-1.el9_4
2.52.5-1.el9_4
redhat/webkit2gtk3-jsc-devel<2.52.5-1.el9_4
2.52.5-1.el9_4
redhat/webkit2gtk3-jsc-devel<2.52.5-1.el9_4
2.52.5-1.el9_4
redhat/webkit2gtk3<2.52.5-1.el9_4
2.52.5-1.el9_4
redhat/webkit2gtk3-debugsource<2.52.5-1.el9_4
2.52.5-1.el9_4
redhat/webkit2gtk3-devel<2.52.5-1.el9_4
2.52.5-1.el9_4
redhat/webkit2gtk3-jsc<2.52.5-1.el9_4
2.52.5-1.el9_4
redhat/webkit2gtk3-jsc-devel<2.52.5-1.el9_4
2.52.5-1.el9_4
redhat/webkit2gtk3<2.52.5-1.el9_4.aa
2.52.5-1.el9_4.aa
redhat/webkit2gtk3-devel<2.52.5-1.el9_4.aa
2.52.5-1.el9_4.aa
redhat/webkit2gtk3-devel-debuginfo<2.52.5-1.el9_4.aa
2.52.5-1.el9_4.aa
redhat/webkit2gtk3-jsc<2.52.5-1.el9_4.aa
2.52.5-1.el9_4.aa
redhat/webkit2gtk3-jsc-devel<2.52.5-1.el9_4.aa
2.52.5-1.el9_4.aa

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/webkit2gtk3 to a version that resolves this vulnerability.

    Fixed in 2.52.5-1.el9_4
  2. Upgrade

    Upgrade redhat/webkit2gtk3-devel to a version that resolves this vulnerability.

    Fixed in 2.52.5-1.el9_4
  3. Upgrade

    Upgrade redhat/webkit2gtk3-jsc to a version that resolves this vulnerability.

    Fixed in 2.52.5-1.el9_4
  4. Upgrade

    Upgrade redhat/webkit2gtk3-jsc-devel to a version that resolves this vulnerability.

    Fixed in 2.52.5-1.el9_4
  5. Upgrade

    Upgrade redhat/webkit2gtk3-debugsource to a version that resolves this vulnerability.

    Fixed in 2.52.5-1.el9_4
  6. Upgrade

    Upgrade redhat/webkit2gtk3 to a version that resolves this vulnerability.

    Fixed in 2.52.5-1.el9_4.aa
  7. Upgrade

    Upgrade redhat/webkit2gtk3-devel to a version that resolves this vulnerability.

    Fixed in 2.52.5-1.el9_4.aa
  8. Upgrade

    Upgrade redhat/webkit2gtk3-devel-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.52.5-1.el9_4.aa
  9. Upgrade

    Upgrade redhat/webkit2gtk3-jsc to a version that resolves this vulnerability.

    Fixed in 2.52.5-1.el9_4.aa
  10. Upgrade

    Upgrade redhat/webkit2gtk3-jsc-devel to a version that resolves this vulnerability.

    Fixed in 2.52.5-1.el9_4.aa

Event History

Aug 13, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·02:42 PM
Data Sourced
via Red Hat·02:42 PM
Severity
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Frequently Asked Questions

1

What is the severity of RHSA-2026:54634?

The severity of RHSA-2026:54634 is high with a score of 7.

2

What vulnerabilities are addressed in RHSA-2026:54634?

RHSA-2026:54634 addresses vulnerabilities including arbitrary JavaScript execution in PDF.js (CVE-2024-4367) and issues that may cause unexpected process crashes.

3

How do I fix RHSA-2026:54634?

To fix RHSA-2026:54634, it is recommended to update the affected packages webkit2gtk3 and its related development packages.

4

What is WebKitGTK and its relevance in RHSA-2026:54634?

WebKitGTK is a port of the WebKit rendering engine for GTK platforms, and it is crucial for displaying web content securely.

5

Which systems are affected by RHSA-2026:54634?

RHSA-2026:54634 affects various Red Hat Enterprise Linux systems including those for IBM z Systems and ARM 64.

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