Amazon Linux 2 : webkitgtk4, --advisory ALAS2-2026-3270 (ALAS-2026-3270)

medium Nessus Plugin ID 311208

Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of webkitgtk4 installed on the remote host is prior to 2.52.1-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3270 advisory.

A memory initialization issue was addressed with improved memory handling. This issue is fixed in tvOS 26.2, Safari 26.2, watchOS 26.2, visionOS 26.2, iOS 26.2 and iPadOS 26.2, macOS Tahoe 26.2. Processing maliciously crafted web content may disclose internal states of the app. (CVE-2025-46299)

A cross-origin issue in the Navigation API was addressed with improved input validation. This issue is fixed in Background Security Improvements for iOS, iPadOS, and macOS, Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. Processing maliciously crafted web content may bypass Same Origin Policy. (CVE-2026-20643)

The issue was addressed with improved memory handling. This issue is fixed in Safari 26.4, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. Processing maliciously crafted web content may lead to an unexpected process crash. (CVE-2026-20664)

This issue was addressed through improved state management. This issue is fixed in Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4.
Processing maliciously crafted web content may prevent Content Security Policy from being enforced.
(CVE-2026-20665)

An authorization issue was addressed with improved state management. This issue is fixed in Safari 26.4, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4, watchOS 26.4. A maliciously crafted webpage may be able to fingerprint the user. (CVE-2026-20691)

The issue was addressed with improved memory handling. This issue is fixed in Safari 26.4, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. Processing maliciously crafted web content may lead to an unexpected process crash. (CVE-2026-28857)

The issue was addressed with improved memory handling. This issue is fixed in Safari 26.4, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4. A malicious website may be able to process restricted web content outside the sandbox. (CVE-2026-28859)

A logic issue was addressed with improved state management. This issue is fixed in Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. A malicious website may be able to access script message handlers intended for other origins. (CVE-2026-28861)

A logic issue was addressed with improved checks. This issue is fixed in Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4. Visiting a maliciously crafted website may lead to a cross-site scripting attack. (CVE-2026-28871)

Tenable has extracted the preceding description block directly from the tested product 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

Run 'yum update webkitgtk4' or or 'yum update --advisory ALAS2-2026-3270' to update your system.

Plugin Details

Severity: Medium

ID: 311208

File Name: al2_ALAS-2026-3270.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 4/30/2026

Updated: 4/30/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.0

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-2026-28859

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.9

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

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

CVSS Score Source: CVE-2026-20665

Vulnerability Information

CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:webkitgtk4-jsc, p-cpe:/a:amazon:linux:webkitgtk4-devel, p-cpe:/a:amazon:linux:webkitgtk4, p-cpe:/a:amazon:linux:webkitgtk4-jsc-devel

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/30/2026

Vulnerability Publication Date: 12/15/2025

Reference Information

CVE: CVE-2025-46299, CVE-2026-20643, CVE-2026-20664, CVE-2026-20665, CVE-2026-20691, CVE-2026-28857, CVE-2026-28859, CVE-2026-28861, CVE-2026-28871

Detections

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