CVE-2026-43731
published 2026-06-29CVE-2026-43731: A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2…
PriorityP347high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
0.23%
14.4th percentile
A use-after-free issue was addressed with improved memory management. 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 memory corruption.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| 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 | macos | >= 26.0 < 26.5.2 | 26.5.2 |
| apple | safari | < 26.5.2 | 26.5.2 |
| webkitgtk | webkitgtk | — | — |
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
vendor_redhat8.8HIGH
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Red Hat
webkitgtk: webkitgtk: Maliciously crafted web content may lead to memory corruption
vendor_redhat·2026-07-10·CVSS 8.8
CVE-2026-43731 [HIGH] CWE-416 webkitgtk: webkitgtk: Maliciously crafted web content may lead to memory corruption
webkitgtk: webkitgtk: Maliciously crafted web content may lead to memory corruption
A use-after-free issue was addressed with improved memory management. 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 memory corruption.
A flaw was found in WebKitGTK. Processing maliciously crafted web content can trigger a use-after-free due to improper memory management, leading to memory corruption.
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: webkit2gtk3
VulDB
Apple Safari/iOS/iPadOS/macOS up to 26.5.1 Web use after free
vuldb·2026-06-30·CVSS 8.8
CVE-2026-43731 [HIGH] Apple Safari/iOS/iPadOS/macOS up to 26.5.1 Web use after free
A vulnerability described as critical has been identified in Apple Safari, iOS, iPadOS and macOS up to 26.5.1. This affects an unknown part of the component Web Handler. Such manipulation leads to use after free.
This vulnerability is referenced as CVE-2026-43731. It is possible to launch the attack remotely. No exploit is available.
Upgrading the affected component is recommended.
GHSA
A use-after-free issue was addressed with improved memory management.
ghsa_unreviewed·2026-06-29
CVE-2026-43731 [HIGH] CWE-416 A use-after-free issue was addressed with improved memory management.
A use-after-free issue was addressed with improved memory management. 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 memory corruption.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-43731 webkitgtk: webkitgtk: Maliciously crafted web content may lead to memory corruption [epel-all]
bugzilla·2026-07-16·CVSS 8.8
CVE-2026-43731 [HIGH] CVE-2026-43731 webkitgtk: webkitgtk: Maliciously crafted web content may lead to memory corruption [epel-all]
CVE-2026-43731 webkitgtk: webkitgtk: Maliciously crafted web content may lead to memory corruption [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.
A use-after-free issue was addressed with improved memory management.
Impact: maliciously crafted web content may lead to memory corruption
Advisory: https://webkitgtk.org/security/WSA-2026-0004.html
WebKit Bug: https://bugs.webkit.org/show_bug.cgi?id=314115
Bugzilla
CVE-2026-43731 webkitgtk: webkitgtk: Maliciously crafted web content may lead to memory corruption
bugzilla·2026-07-14·CVSS 8.8
CVE-2026-43731 [HIGH] CVE-2026-43731 webkitgtk: webkitgtk: Maliciously crafted web content may lead to memory corruption
CVE-2026-43731 webkitgtk: webkitgtk: Maliciously crafted web content may lead to memory corruption
A use-after-free issue was addressed with improved memory management.
Impact: maliciously crafted web content may lead to memory corruption
Advisory: https://webkitgtk.org/security/WSA-2026-0004.html
WebKit Bug: https://bugs.webkit.org/show_bug.cgi?id=314115
2026-06-29
Published