CVE-2026-43663
published 2026-06-29CVE-2026-43663: The issue was addressed with improved memory handling. This issue is fixed in Safari 26.5.2, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.5.2 and iPadOS 26.5.2…
PriorityP431medium6.5CVSS 3.1
AVNACLPRNUIRSUCNINAH
EPSS
0.37%
30.1th percentile
The issue was addressed with improved memory handling. This issue is fixed in Safari 26.5.2, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may lead to an unexpected process crash.
Affected
11 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apple | ios_and_ipados | < 18.7.10 | 18.7.10 |
| apple | ios_and_ipados | < 26.5.2 | 26.5.2 |
| apple | ipados | < 26.5.2 | 26.5.2 |
| apple | iphone_os | < 26.5.2 | 26.5.2 |
| apple | macos | < 26.5.2 | 26.5.2 |
| apple | safari | < 26.5.2 | 26.5.2 |
| apple | tvos | < 26.6 | 26.6 |
| apple | visionos | < 26.6 | 26.6 |
| apple | watchos | < 26.6 | 26.6 |
| ubuntu | webkit2gtk | — | — |
| webkitgtk | webkitgtk | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
vendor_redhat6.5MEDIUM
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VulDB
Apple Safari/iOS/iPadOS/macOS up to 26.5.1 Web denial of service
vuldb·2026-06-30·CVSS 6.5
CVE-2026-43663 [MEDIUM] Apple Safari/iOS/iPadOS/macOS up to 26.5.1 Web denial of service
A vulnerability identified as problematic has been detected in Apple Safari, iOS, iPadOS and macOS up to 26.5.1. This issue affects some unknown processing of the component Web Handler. This manipulation causes denial of service.
The identification of this vulnerability is CVE-2026-43663. It is possible to initiate the attack remotely. There is no exploit available.
You should upgrade the affected component.
GHSA
The issue was addressed with improved memory handling.
ghsa_unreviewed·2026-06-29
CVE-2026-43663 [MEDIUM] CWE-119 The issue was addressed with improved memory handling.
The issue was addressed with improved memory handling. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. Processing maliciously crafted web content may lead to an unexpected process crash.
Ubuntu
WebKitGTK vulnerabilities
vendor_ubuntu·2026-08-31
CVE-2026-43742 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: webkitgtk: Maliciously crafted web content may cause unexpected process crash
vendor_redhat·2026-07-10·CVSS 6.5
CVE-2026-43663 [MEDIUM] CWE-416 webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash
webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash
The issue was addressed with improved memory handling. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. Processing maliciously crafted web content may lead to an unexpected process crash.
A flaw was found in WebKitGTK. Processing maliciously crafted web content can trigger a use-after-free due to improper memory handling, resulting in an unexpected process crash.
Package: pywebkitgtk (Red Hat Enterprise Linux 6) - Out of support scope
Package: webkitgtk (Red Hat Enterprise Linux 6) - Out of support scope
Package: webkitgtk3 (Red Hat Enterprise Linux 7) - Out of support scope
Package: webkitgtk4 (Red Hat Enterprise Linux 7) - Out of support scope
Package: we
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-43663 webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash [fedora-all]
bugzilla·2026-08-31·CVSS 6.5
CVE-2026-43663 [MEDIUM] CVE-2026-43663 webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash [fedora-all]
CVE-2026-43663 webkitgtk: webkitgtk: Maliciously crafted web content may cause 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.
The issue was addressed with improved memory handling.
Impact: maliciously crafted web content may cause unexpected process crash
Advisory: https://webkitgtk.org/security/WSA-2026-0004.html
WebKit Bug: https://bugs.webkit.org/show_bug.cgi?id=312781
Bugzilla
CVE-2026-43663 webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash [epel-all]
bugzilla·2026-08-31·CVSS 6.5
CVE-2026-43663 [MEDIUM] CVE-2026-43663 webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash [epel-all]
CVE-2026-43663 webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash [epel-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.
The issue was addressed with improved memory handling.
Impact: maliciously crafted web content may cause unexpected process crash
Advisory: https://webkitgtk.org/security/WSA-2026-0004.html
WebKit Bug: https://bugs.webkit.org/show_bug.cgi?id=312781
Bugzilla
CVE-2026-43663 webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash
bugzilla·2026-07-14·CVSS 6.5
CVE-2026-43663 [MEDIUM] CVE-2026-43663 webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash
CVE-2026-43663 webkitgtk: webkitgtk: Maliciously crafted web content may cause unexpected process crash
The issue was addressed with improved memory handling.
Impact: maliciously crafted web content may cause unexpected process crash
Advisory: https://webkitgtk.org/security/WSA-2026-0004.html
WebKit Bug: https://bugs.webkit.org/show_bug.cgi?id=312781
Sans Isc
Apple Patches iOS and macOS, (Mon, Aug 17th)
blogs_sans_isc·2026-08-17·CVSS 5.5
CVE-2026-28958 [MEDIUM] Apple Patches iOS and macOS, (Mon, Aug 17th)
Apple Patches iOS and macOS
Published: 2026-08-17. Last Updated: 2026-08-17 20:26:39 UTC
by Johannes Ullrich (Version: 1)
0 comment(s)
Apple today released updates for iOS/iPadOS (26 and 18) and macOS 26. This update fixes 108 vulnerabilities and comes about two weeks after the much smaller macOS update that addressed the single screen-sharing vulnerability. This vulnerability did not affect iOS/iPadOS.
None of the vulnerabilities has been exploited so far. There are a few WebKit vulnerabilities, but no standalone Safari patch for older operating systems. 87 of the vulnerabilities affect only iOS 18, making this more of an iOS 18 release than one for the newer operating systems. Only six vulnerabilities affect all three OSs released today. All 6 vulnerabilities affect WebKit.
Apple's
2026-06-29
Published