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OpenAdvisories
Medium · 5.4 Public exploit CVE-2026-20643 EUVD-2026-12663

A cross-origin issue in the Navigation API was addressed with improved input validation. This issue is fixed in Background Security Improve…

Published Mar 17, 2026 · Updated Oct 26, 2026 · Assigned by apple

Vendor: Apple Product: iOS and iPadOS Product: macOS Product: Safari Product: visionOS Package: qtwebkit-opensource-src Package: qtwebkit-source Package: webkit2gtk Package: webkit2gtk Package: webkitgtk Package: wpewebkit Package: wpewebkit Platform: iOS Platform: macOS Category: Browsers Ecosystem: Debian Ecosystem: Ubuntu

Description

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.

Affected products

VendorProductAffectedFixed
Apple Safari < 26.4 26.4
Apple iOS and iPadOS < 18.7.7, < 26.3.1 (a), < 26.4 18.7.7
Apple macOS < 26.3.1 (a), < 26.3.2 (a), < 26.4 26.3.1 (a)
Apple visionOS < 26.4 26.4

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Debian

Security tracker ↗
ReleasePackageFixed inAdvisory
Debian 14 wpewebkit +1 2.52.1-1 —
Debian 13 webkit2gtk 2.52.3-2~deb13u1 —
Debian 13 wpewebkit No fix yet —
Debian 12 wpewebkit +1 No fix yet —

Ubuntu

Security tracker ↗
ReleasePackageFixed inAdvisory
Ubuntu 26.04 LTS webkit2gtk 2.52.3-0ubuntu0.26.04.2 —
Ubuntu 25.10 webkit2gtk 2.52.3-0ubuntu0.25.10.1 —
Ubuntu 24.04 LTS qtwebkit-opensource-src No fix yet —
Ubuntu 24.04 LTS webkit2gtk 2.52.3-0ubuntu0.24.04.1 —
Ubuntu 22.04 LTS wpewebkit +2 No fix yet —
Ubuntu 20.04 LTS wpewebkit +2 No fix yet —
Show 2 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 18.04 LTS webkitgtk +3 No fix yet —
Ubuntu 16.04 LTS webkitgtk +3 No fix yet —

Red Hat

Security tracker ↗
ReleasePackageFixed inAdvisory
RHEL 9 webkit2gtk3 +3 2.52.3-0.el9_7.1 RHSA-2026:19206, RHSA-2026:9692
RHEL 8 webkit2gtk3 +3 2.52.3-1.el8_10 RHSA-2026:10702
Show 12 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
RHEL 9.6 EUS webkit2gtk3 +3 2.52.3-1.el9_6 RHSA-2026:11329
RHEL 9.4 EUS webkit2gtk3 +3 2.52.3-1.el9_4 RHSA-2026:14659
RHEL 9.2 E4S webkit2gtk3 +3 2.52.3-1.el9_2 RHSA-2026:16695
RHEL 9.0 E4S webkit2gtk3 +3 2.52.3-1.el9_0 RHSA-2026:19535
RHEL 8.8 TUS webkit2gtk3 +3 2.52.3-1.el8_8 RHSA-2026:11814
RHEL 8.8 E4S webkit2gtk3 +3 2.52.3-1.el8_8 RHSA-2026:11814
RHEL 8.6 TUS webkit2gtk3 +3 2.52.3-1.el8_6 RHSA-2026:13845
RHEL 8.6 E4S webkit2gtk3 +3 2.52.3-1.el8_6 RHSA-2026:13845
RHEL 8.6 AUS webkit2gtk3 +3 2.52.3-1.el8_6 RHSA-2026:13845
RHEL 8.4 EUS Long Life webkit2gtk3 +3 2.52.3-1.el8_4 RHSA-2026:16056
RHEL 8.4 AUS webkit2gtk3 +3 2.52.3-1.el8_4 RHSA-2026:16056
RHEL 7 ELS webkitgtk4 +4 2.52.3-1.el7_9 RHSA-2026:22136

AlmaLinux

Errata ↗
ReleasePackageFixed inAdvisory
AlmaLinux 9 webkit2gtk3 +3 2.52.3-0.el9_7.1 ALSA-2026:19206, ALSA-2026:9692
AlmaLinux 8 webkit2gtk3 +3 2.52.3-1.el8_10 ALSA-2026:10702

Rocky Linux

Errata ↗
ReleasePackageFixed inAdvisory
Rocky Linux 9 webkit2gtk3 2.52.3-0.el9_7.1 RLSA-2026:19206, RLSA-2026:9692
Rocky Linux 8 webkit2gtk3 2.52.3-1.el8_10 RLSA-2026:10702

SUSE

Security tracker ↗
ReleasePackageFixed inAdvisory
SLES 15 SP7 webkit2gtk3 +2 2.52.1-150600.12.63.1 SUSE-SU-2026:1364-1
SLES 15 SP6 webkit2gtk3 +2 2.52.1-150600.12.63.1 SUSE-SU-2026:1364-1
Show 3 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES for SAP 16.0 webkit2gtk3 +1 2.52.1-160000.1.1 SUSE-SU-2026:21180-1
SLES for SAP 15 SP6 webkit2gtk3 +2 2.52.1-150600.12.63.1 SUSE-SU-2026:1364-1
SLES 16.0 webkit2gtk3 +1 2.52.1-160000.1.1 SUSE-SU-2026:21180-1

openSUSE

Security tracker ↗
ReleasePackageFixed inAdvisory
openSUSE Leap 16.0 webkit2gtk3 +2 2.52.1-160000.1.1 openSUSE-SU-2026:20518-1
openSUSE Leap 15.6 webkit2gtk3 +2 2.52.1-150600.12.63.1 SUSE-SU-2026:1364-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2 webkitgtk4 +3 2.52.1-1.amzn2 ALAS2-2026-3270

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 9 webkit2gtk3 +3 2.52.3-0.el9_7.1 ELSA-2026-19206, ELSA-2026-9692
Oracle Linux 8 webkit2gtk3 +3 2.52.3-1.el8_10 ELSA-2026-10702

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 2 repositories

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 30

References