RHEL 9 : webkit2gtk3 (RHSA-2026:84583)

critical Nessus Plugin ID 367211

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:84583 advisory.

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

Security Fix(es):

* chromium-browser: angle: ANGLE in Google Chrome: Information disclosure via out-of-bounds read (CVE-2026-87596)

* chromium-browser: angle: ANGLE in Google Chrome: Arbitrary code execution via crafted HTML page (CVE-2026-87500)

* chromium-browser: angle: Chromium: Arbitrary code execution via buffer overflow in ANGLE (CVE-2026-87654)

* chromium-browser: angle: Google Chrome (ANGLE): Arbitrary Code Execution vulnerability (CVE-2026-87621)

* chromium-browser: angle: Chromium-browser: Arbitrary code execution via use-after-free vulnerability in ANGLE (CVE-2026-87512)

* chromium-browser: angle: ANGLE: Arbitrary code execution in Google Chrome due to use-after-free (CVE-2026-87648)

* chromium-browser: angle: ANGLE in Google Chrome: Information disclosure via crafted HTML page (CVE-2026-87602)

* chromium-browser: angle: ANGLE in Google Chrome: Information disclosure via crafted HTML page (CVE-2026-87586)

* chromium-browser: angle: ANGLE in Google Chrome: Arbitrary code execution via out-of-bounds read (CVE-2026-87604)

* chromium-browser: angle: chromium-browser: Improper input validation in ANGLE (CVE-2026-91738)

* chromium-browser: angle: chromium-browser: Uninitialized resource in ANGLE (CVE-2026-91720)

Bug Fix(es) and Enhancement(s):

* webkit2gtk3 2.54.0 regression breaks Eclipse IDE WebKit-based views on CentOS Stream 9 [rhel-9.8.z] (JIRA:RHEL-274394)

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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

Plugin Details

Severity: Critical

ID: 367211

File Name: redhat-RHSA-2026-84583.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 10/19/2026

Updated: 10/19/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.24

Vendor

Vendor Severity: Critical

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-91738

CVSS v3

Risk Factor: Critical

Base Score: 9.6

Temporal Score: 8.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:9, cpe:/o:redhat:rhel_eus:9.8, p-cpe:/a:redhat:enterprise_linux:webkit2gtk3-devel, p-cpe:/a:redhat:enterprise_linux:webkit2gtk3-jsc-devel, p-cpe:/a:redhat:enterprise_linux:webkit2gtk3-jsc, p-cpe:/a:redhat:enterprise_linux:webkit2gtk3

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/19/2026

Vulnerability Publication Date: 9/8/2026

Reference Information

CVE: CVE-2026-87500, CVE-2026-87512, CVE-2026-87586, CVE-2026-87596, CVE-2026-87602, CVE-2026-87604, CVE-2026-87621, CVE-2026-87648, CVE-2026-87654, CVE-2026-91720, CVE-2026-91738

CWE: 120, 125, 1286, 787, 824, 825

RHSA: 2026:84583

Detections

Analytics