CVE-2026-28859 json
The issue was addressed with improved memory handling.
published 2026-03-25 7 mo ago modified 2026-07-15 3 mo ago also EUVD-2026-15133
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 51%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Apple Safari 26.4
- Apple iOS and iPadOS 26.4
- Apple macOS 26.4
- Apple tvOS 26.4
- Apple visionOS 26.4
- Apple watchOS 26.4
- Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:2.52.3-1.el7_9
- Red Hat Red Hat Enterprise Linux 8 0:2.52.3-1.el8_10
- Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:2.52.3-1.el8_4
- Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:2.52.3-1.el8_4
- Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:2.52.3-1.el8_6
- Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service 0:2.52.3-1.el8_6
- Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 0:2.52.3-1.el8_6
- Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:2.52.3-1.el8_8
- Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:2.52.3-1.el8_8
- Red Hat Red Hat Enterprise Linux 9 0:2.52.3-0.el9_7.1, 0:2.52.3-1.el9_8
- Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 0:2.52.3-1.el9_0
- Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:2.52.3-1.el9_2
- Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 0:2.52.3-1.el9_4
- Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:2.52.3-1.el9_6
- wpewebkit Debian 14 2.52.1-1
- webkit2gtk Debian 13 2.52.3-2~deb13u1
- webkit2gtk Debian 14 2.52.1-1
debian advisories DEBIAN-CVE-2026-28859
- webkit2gtk Ubuntu 24.04 LTS 2.52.3-0ubuntu0.24.04.1
- webkit2gtk Ubuntu 25.10 2.52.3-0ubuntu0.25.10.1
- webkit2gtk Ubuntu 26.04 LTS 2.52.3-0ubuntu0.26.04.2
ubuntu advisories UBUNTU-CVE-2026-28859
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- webkit2gtk3 RHEL 9 2.52.3-1.el9_8
- webkit2gtk3-jsc RHEL 9 2.52.3-1.el9_8
- webkit2gtk3 RHEL 8 2.52.3-1.el8_10
- webkit2gtk3-jsc RHEL 8 2.52.3-1.el8_10
- webkit2gtk3 RHEL 9 2.52.3-0.el9_7.1
- webkit2gtk3-jsc RHEL 9 2.52.3-0.el9_7.1
- webkitgtk4 RHEL 7 ELS 2.52.3-1.el7_9
- webkitgtk4-jsc RHEL 7 ELS 2.52.3-1.el7_9
red hat advisories RHSA-2026:22136RHSA-2026:19535RHSA-2026:19206RHSA-2026:16695RHSA-2026:16056RHSA-2026:14659
- webkit2gtk3 SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Desktop Applications 15 SP7 +1 more 2.52.1-150600.12.63.1
- webkit2gtk4 SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Development Tools 15 SP7 +2 more 2.52.1-150600.12.63.1
- webkit2gtk3-soup2 SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Basesystem 15 SP7 +1 more 2.52.1-150600.12.63.1
- webkit2gtk3 SLES for SAP applications 16.0, SLES 16.0 2.52.1-160000.1.1
- webkit2gtk4 SLES for SAP applications 16.0, SLES 16.0 2.52.1-160000.1.1
suse advisories SUSE-SU-2026:1364-1SUSE-SU-2026:21180-1
- webkit2gtk3 openSUSE Leap 16.0 2.52.1-160000.1.1
- webkit2gtk4 openSUSE Leap 16.0 2.52.1-160000.1.1
- webkit2gtk3-soup2 openSUSE Leap 16.0 2.52.1-160000.1.1
opensuse advisories openSUSE-SU-2026:20518-1
- webkit2gtk3 AlmaLinux 9 2.52.3-1.el9_8
- webkit2gtk3-jsc AlmaLinux 9 2.52.3-1.el9_8
- webkit2gtk3 AlmaLinux 8 2.52.3-1.el8_10
- webkit2gtk3-jsc AlmaLinux 8 2.52.3-1.el8_10
- webkit2gtk3 AlmaLinux 9 2.52.3-0.el9_7.1
- webkit2gtk3-jsc AlmaLinux 9 2.52.3-0.el9_7.1
almalinux advisories ALSA-2026:19206ALSA-2026:10702ALSA-2026:9692
- webkit2gtk3 Rocky Linux 9 2.52.3-1.el9_8
- webkit2gtk3 Rocky Linux 8 2.52.3-1.el8_10
- webkit2gtk3 Rocky Linux 9 2.52.3-0.el9_7.1
rocky linux advisories RLSA-2026:19206RLSA-2026:10702RLSA-2026:9692
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2026-28859 updated cvss 8.8
webkitgtk: A malicious website may be able to process restricted web content outside the sandbox
-
Red Hat Enterprise Linux 6 webkitgtkaffected: workaround, no fix planned “Out of support scope”
-
Red Hat Enterprise Linux AppStream (v. 8) webkit2gtk3 2.52.3-1.el8_10, webkit2gtk3-jsc 2.52.3-1.el8_10fixed: vendor fix RHSA-2026:10702
-
Red Hat Enterprise Linux AppStream (v. 9) webkit2gtk3 2.52.3-1.el9_8, webkit2gtk3 2.52.3-0.el9_7.1, webkit2gtk3-jsc 2.52.3-1.el9_8, webkit2gtk3-jsc 2.52.3-0.el9_7.1fixed: vendor fix RHSA-2026:9692
-
Red Hat Enterprise Linux AppStream AUS (v.8.4) webkit2gtk3 2.52.3-1.el8_4, webkit2gtk3-jsc 2.52.3-1.el8_4fixed: vendor fix RHSA-2026:16056
-
Red Hat Enterprise Linux AppStream AUS (v.8.6) webkit2gtk3 2.52.3-1.el8_6, webkit2gtk3-jsc 2.52.3-1.el8_6 Red Hat Enterprise Linux AppStream E4S (v.8.6) webkit2gtk3 2.52.3-1.el8_6, webkit2gtk3-jsc 2.52.3-1.el8_6fixed: vendor fix RHSA-2026:13845
-
Red Hat Enterprise Linux AppStream E4S (v.8.8) webkit2gtk3 2.52.3-1.el8_8, webkit2gtk3-jsc 2.52.3-1.el8_8fixed: vendor fix RHSA-2026:11814
-
Red Hat Enterprise Linux AppStream E4S (v.9.0) webkit2gtk3 2.52.3-1.el9_0, webkit2gtk3-jsc 2.52.3-1.el9_0fixed: vendor fix RHSA-2026:19535
-
Red Hat Enterprise Linux AppStream E4S (v.9.2) webkit2gtk3 2.52.3-1.el9_2, webkit2gtk3-jsc 2.52.3-1.el9_2fixed: vendor fix RHSA-2026:16695
show 7 moreshow fewer
-
Red Hat Enterprise Linux AppStream EUS (v.9.4) webkit2gtk3 2.52.3-1.el9_4, webkit2gtk3-jsc 2.52.3-1.el9_4fixed: vendor fix RHSA-2026:14659
-
Red Hat Enterprise Linux AppStream EUS (v.9.6) webkit2gtk3 2.52.3-1.el9_6, webkit2gtk3-jsc 2.52.3-1.el9_6fixed: vendor fix RHSA-2026:11329
-
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) webkit2gtk3 2.52.3-1.el8_4, webkit2gtk3-jsc 2.52.3-1.el8_4fixed: vendor fix RHSA-2026:16056
-
Red Hat Enterprise Linux AppStream TUS (v.8.6) webkit2gtk3 2.52.3-1.el8_6, webkit2gtk3-jsc 2.52.3-1.el8_6fixed: vendor fix RHSA-2026:13845
-
Red Hat Enterprise Linux AppStream TUS (v.8.8) webkit2gtk3 2.52.3-1.el8_8, webkit2gtk3-jsc 2.52.3-1.el8_8fixed: vendor fix RHSA-2026:11814
-
Red Hat Enterprise Linux Server (v. 7 ELS) webkitgtk4 2.52.3-1.el7_9, webkitgtk4-jsc 2.52.3-1.el7_9 Red Hat Enterprise Linux Server Optional (v. 7 ELS) webkitgtk4-doc 2.52.3-1.el7_9, webkitgtk4-devel 2.52.3-1.el7_9, webkitgtk4-debuginfo 2.52.3-1.el7_9, webkitgtk4-jsc-devel 2.52.3-1.el7_9fixed: vendor fix RHSA-2026:22136
-
Red Hat Enterprise Linux 7 webkitgtk3, libwebkit2gtknot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.66% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N |
| CISA ADP | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Affected products
- Apple Safari
- Apple iOS and iPadOS
- Apple macOS
- Apple tvOS
- Apple visionOS
- Apple watchOS
- Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
- Red Hat Red Hat Enterprise Linux 8
- Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
- Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
- Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
- Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service
- Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
- Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
- Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
- Red Hat Red Hat Enterprise Linux 9
- Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
- Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
- Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support
- Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
- Red Hat Red Hat Enterprise Linux 6
- Red Hat Red Hat Enterprise Linux 7
Classification
References
-
access.redhat.com
/errata/RHSA-2026:22136
vendor-advisory
-
access.redhat.com
/errata/RHSA-2026:10702
vendor-advisory
-
access.redhat.com
/errata/RHSA-2026:16056
vendor-advisory
-
access.redhat.com
/errata/RHSA-2026:13845
vendor-advisory
-
access.redhat.com
/errata/RHSA-2026:11814
vendor-advisory
-
access.redhat.com
/errata/RHSA-2026:19535
vendor-advisory
-
access.redhat.com
/errata/RHSA-2026:16695
vendor-advisory
-
access.redhat.com
/errata/RHSA-2026:14659
vendor-advisory
-
access.redhat.com
/errata/RHSA-2026:11329
vendor-advisory
-
access.redhat.com
/errata/RHSA-2026:9692
vendor-advisory
-
access.redhat.com
/errata/RHSA-2026:19206
vendor-advisory
-
support.apple.com
/en-us/126792
release-notes, vendor-advisory
-
support.apple.com
/en-us/126794
release-notes, vendor-advisory
-
support.apple.com
/en-us/126797
release-notes, vendor-advisory
-
support.apple.com
/en-us/126798
release-notes, vendor-advisory
-
support.apple.com
/en-us/126799
release-notes, vendor-advisory
-
support.apple.com
/en-us/126800
release-notes, vendor-advisory
-
access.redhat.com
/security/cve/CVE-2026-28859
vdb-entry
-
bugzilla.redhat.com
/show_bug.cgi?id=2453006
issue-tracking
- security.access.redhat.com /data/csaf/v2/vex/2026/cve-2026-28859.json
Sources
- CVE List CVE-2026-28859
- NVD CVE-2026-28859
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.