CVE-2026-20644
published 2026-02-11CVE-2026-20644: The issue was addressed with improved memory handling. This issue is fixed in Safari 26.3, iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3, macOS Tahoe…
PriorityP432medium6.5CVSS 3.1
AVNACLPRNUIRSUCNINAH
EPSS
0.29%
21.4th percentile
The issue was addressed with improved memory handling. This issue is fixed in Safari 26.3, iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3, macOS Tahoe 26.3, visionOS 26.3. Processing maliciously crafted web content may lead to an unexpected process crash.
Affected
17 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apple | ios_18.7.5_and_ipados | — | — |
| apple | ios_26.3_and_ipados | — | — |
| apple | ios_and_ipados | < 18.7.5 | 18.7.5 |
| apple | ios_and_ipados | < 26.3 | 26.3 |
| apple | ipados | < 18.7.5 | 18.7.5 |
| apple | ipados | >= 26.0 < 26.3 | 26.3 |
| apple | iphone_os | < 18.7.5 | 18.7.5 |
| apple | iphone_os | >= 26.0 < 26.3 | 26.3 |
| apple | macos | < 26.3 | 26.3 |
| apple | macos_tahoe | — | — |
| apple | safari | < 26.3 | 26.3 |
| apple | safari | — | — |
| apple | visionos | < 26.3 | 26.3 |
| apple | visionos | — | — |
| debian | webkit2gtk | < webkit2gtk 2.50.6-1~deb12u1 (bookworm) | webkit2gtk 2.50.6-1~deb12u1 (bookworm) |
| debian | wpewebkit | < webkit2gtk 2.50.6-1~deb12u1 (bookworm) | webkit2gtk 2.50.6-1~deb12u1 (bookworm) |
| ubuntu | webkit2gtk | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
osv6.5MEDIUM
vendor_debian6.5MEDIUM
vendor_redhat6.5MEDIUM
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Ubuntu
WebKitGTK vulnerabilities
vendor_ubuntu·2026-05-06
CVE-2026-20644 WebKitGTK vulnerabilities
Title: WebKitGTK vulnerabilities
Summary: Several security issues were fixed in WebKitGTK.
Several security issues were discovered in the WebKitGTK Web and JavaScript
engines. If a user were tricked into viewing a malicious website, a remote
attacker could exploit a variety of issues related to web browser security,
including cross-site scripting attacks, denial of service attacks, and
arbitrary code execution.
Instructions: This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart any applications
that use WebKitGTK, such as Epiphany, to make all the necessary changes.
Red Hat
webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
vendor_redhat·2026-03-18·CVSS 6.5
CVE-2026-20644 [MEDIUM] CWE-120 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
The issue was addressed with improved memory handling. This issue is fixed in Safari 26.3, iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3, macOS Tahoe 26.3, visionOS 26.3. Processing maliciously crafted web content may lead to an unexpected process crash.
A flaw was found in WebKitGTK. Processing malicious web content can cause an unexpected process crash due to improper memory handling.
Statement: To exploit this issue, an attacker needs to trick a user into processing or loading malicious web content. Due to this reason, this flaw has been rated with an important severity.
Additionally, this issue can cause an unexpected process crash but the possibility of remote code execution is no
Apple
CVE-2026-20644: Safari 26.3
vendor_apple·2026-02-11·CVSS 6.5
CVE-2026-20644 [MEDIUM] CVE-2026-20644: Safari 26.3
Apple Security Update: About the security content of Safari 26.3
Product: Safari
Version: 26.3
CVE: CVE-2026-20644
Component: WebKit
Impact: Processing maliciously crafted web content may lead to an unexpected process crash
Description: The issue was addressed with improved memory handling.
Apple
CVE-2026-20644: iOS 26.3 and iPadOS 26.3
vendor_apple·2026-02-11·CVSS 6.5
CVE-2026-20644 [MEDIUM] CVE-2026-20644: iOS 26.3 and iPadOS 26.3
Apple Security Update: About the security content of iOS 26.3 and iPadOS 26.3
Product: iOS 26.3 and iPadOS
Version: 26.3
CVE: CVE-2026-20644
Component: WebKit
Impact: Processing maliciously crafted web content may lead to an unexpected process crash
Description: The issue was addressed with improved memory handling.
Apple
CVE-2026-20644: macOS Tahoe 26.3
vendor_apple·2026-02-11·CVSS 6.5
CVE-2026-20644 [MEDIUM] CVE-2026-20644: macOS Tahoe 26.3
Apple Security Update: About the security content of macOS Tahoe 26.3
Product: macOS Tahoe
Version: 26.3
CVE: CVE-2026-20644
Component: WebKit
Impact: Processing maliciously crafted web content may lead to an unexpected process crash
Description: The issue was addressed with improved memory handling.
Apple
CVE-2026-20644: iOS 18.7.5 and iPadOS 18.7.5
vendor_apple·2026-02-11·CVSS 6.5
CVE-2026-20644 [MEDIUM] CVE-2026-20644: iOS 18.7.5 and iPadOS 18.7.5
Apple Security Update: About the security content of iOS 18.7.5 and iPadOS 18.7.5
Product: iOS 18.7.5 and iPadOS
Version: 18.7.5
CVE: CVE-2026-20644
Component: WebKit
Impact: Processing maliciously crafted web content may lead to an unexpected process crash
Description: The issue was addressed with improved memory handling.
Apple
CVE-2026-20644: visionOS 26.3
vendor_apple·2026-02-11·CVSS 6.5
CVE-2026-20644 [MEDIUM] CVE-2026-20644: visionOS 26.3
Apple Security Update: About the security content of visionOS 26.3
Product: visionOS
Version: 26.3
CVE: CVE-2026-20644
Component: WebKit
Impact: Processing maliciously crafted web content may lead to an unexpected process crash
Description: The issue was addressed with improved memory handling.
Debian
CVE-2026-20644: webkit2gtk - The issue was addressed with improved memory handling. This issue is fixed in Sa...
vendor_debian·2026·CVSS 6.5
CVE-2026-20644 [MEDIUM] CVE-2026-20644: webkit2gtk - The issue was addressed with improved memory handling. This issue is fixed in Sa...
The issue was addressed with improved memory handling. This issue is fixed in Safari 26.3, iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3, macOS Tahoe 26.3, visionOS 26.3. Processing maliciously crafted web content may lead to an unexpected process crash.
Scope: local
bookworm: resolved (fixed in 2.50.6-1~deb12u1)
bullseye: open
forky: resolved (fixed in 2.50.6-1)
sid: resolved (fixed in 2.50.6-1)
trixie: resolved (fixed in 2.50.6-1~deb13u1)
VulDB
Apple Safari/macOS/visionOS/iOS/iPadOS up to 26.2 Web memory corruption (Nessus ID 303253)
vuldb·2026-07-01·CVSS 6.5
CVE-2026-20644 [MEDIUM] Apple Safari/macOS/visionOS/iOS/iPadOS up to 26.2 Web memory corruption (Nessus ID 303253)
A vulnerability was found in Apple Safari, macOS, visionOS, iOS and iPadOS up to 26.2 and classified as critical. The affected element is an unknown function of the component Web Handler. Such manipulation leads to memory corruption.
This vulnerability is uniquely identified as CVE-2026-20644. The attack can be launched remotely. No exploit exists.
It is suggested to upgrade the affected component.
GHSA
GHSA-pxhf-qg7h-8x8m: The issue was addressed with improved memory handling
ghsa_unreviewed·2026-02-12
CVE-2026-20644 [MEDIUM] CWE-119 GHSA-pxhf-qg7h-8x8m: The issue was addressed with improved memory handling
The issue was addressed with improved memory handling. This issue is fixed in macOS Tahoe 26.3, iOS 18.7.5 and iPadOS 18.7.5, visionOS 26.3, iOS 26.3 and iPadOS 26.3, Safari 26.3. Processing maliciously crafted web content may lead to an unexpected process crash.
OSV
CVE-2026-20644: The issue was addressed with improved memory handling
osv·2026-02-11·CVSS 6.5
CVE-2026-20644 [MEDIUM] CVE-2026-20644: The issue was addressed with improved memory handling
The issue was addressed with improved memory handling. This issue is fixed in Safari 26.3, iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3, macOS Tahoe 26.3, visionOS 26.3. Processing maliciously crafted web content may lead to an unexpected process crash.
OSV
CVE-2026-20644: The issue was addressed with improved memory handling
osv·2026-02-11·CVSS 6.5
CVE-2026-20644 [MEDIUM] CVE-2026-20644: The issue was addressed with improved memory handling
The issue was addressed with improved memory handling. This issue is fixed in macOS Tahoe 26.3, iOS 18.7.5 and iPadOS 18.7.5, visionOS 26.3, iOS 26.3 and iPadOS 26.3, Safari 26.3. Processing maliciously crafted web content may lead to an unexpected process crash.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-20644 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash [fedora-all]
bugzilla·2026-03-19·CVSS 6.5
CVE-2026-20644 [MEDIUM] CVE-2026-20644 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash [fedora-all]
CVE-2026-20644 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
FEDORA-2026-431948187d (webkitgtk-2.52.0-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-431948187d
---
FEDORA-2026-6502cee6c2 (webkitgtk-2.52.0-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-6502cee6c2
---
FEDORA-2026-36594550b0 (webkitgtk-2.52.0-1.fc42) has been submitted as an update to Fedora 42.
https://bodhi.fe
Bugzilla
CVE-2026-20644 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
bugzilla·2026-03-18·CVSS 6.5
CVE-2026-20644 [MEDIUM] CVE-2026-20644 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
CVE-2026-20644 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
The issue was addressed with improved memory handling. This issue is fixed in macOS Tahoe 26.3, iOS 18.7.5 and iPadOS 18.7.5, visionOS 26.3, iOS 26.3 and iPadOS 26.3, Safari 26.3. Processing maliciously crafted web content may lead to an unexpected process crash.
Discussion:
This issue has been addressed in the following products:
Red Hat Enterprise Linux 9
Via RHSA-2026:9692 https://access.redhat.com/errata/RHSA-2026:9692
Wiz
CVE-2026-20644 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 6.5
CVE-2026-20644 [MEDIUM] CVE-2026-20644 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-20644 :
Apple Safari vulnerability analysis and mitigation
The issue was addressed with improved memory handling. This issue is fixed in Safari 26.3, iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3, macOS Tahoe 26.3, visionOS 26.3. Processing maliciously crafted web content may lead to an unexpected process crash.
Source : NVD
## 6.5
Score
Published February 11, 2026
Severity MEDIUM
CNA Score 6.5
Affected Technologies
Apple Safari
macOS
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 13.5
Exploitation Probability (EPSS) N/A
Affected packages and libraries
typelib-1_0-WebKit2WebExtension-4_0
webkit2gtk-4_1-injected-bundles
Sources
Debian 11 Severity MEDIUM No F
https://support.apple.com/en-us/126346https://support.apple.com/en-us/126347https://support.apple.com/en-us/126348https://support.apple.com/en-us/126353https://support.apple.com/en-us/126354https://access.redhat.com/errata/RHSA-2026:10702https://access.redhat.com/errata/RHSA-2026:11329https://access.redhat.com/errata/RHSA-2026:11814https://access.redhat.com/errata/RHSA-2026:13845https://access.redhat.com/errata/RHSA-2026:14659https://access.redhat.com/errata/RHSA-2026:16056https://access.redhat.com/errata/RHSA-2026:16695https://access.redhat.com/errata/RHSA-2026:19206https://access.redhat.com/errata/RHSA-2026:19535https://access.redhat.com/errata/RHSA-2026:22136https://access.redhat.com/errata/RHSA-2026:9692https://access.redhat.com/security/cve/CVE-2026-20644https://bugzilla.redhat.com/show_bug.cgi?id=2448792https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-20644.json
2026-02-11
Published