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Apple and Red Hat disclosed CVE-2026-43720, a use-after-free vulnerability in WebKit and WebKitGTK that can be triggered when a user processes maliciously crafted web content. The flaw, mapped to CWE-416, stems from improper memory management and can cause an unexpected browser or process crash, including Safari crashes on Apple platforms. Red Hat rated the issue moderate with a CVSS v3.1 score of 6.5, noting that exploitation requires user interaction and primarily affects availability.
Fixes were released across Apple products including Safari, iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS, while Red Hat published remediation for affected WebKitGTK packages in multiple Red Hat Enterprise Linux 7, 8, and 9 offerings. Red Hat said RHEL 6 packages are outside support scope and should be assumed affected, and linked the issue to WebKit advisory WSA-2026-0004 and upstream bug 313175.
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Red Hat tracked CVE-2026-43720 as Bugzilla bug 2500530 under its Security Response product. The bug classified the WebKitGTK flaw as a medium-severity, medium-priority vulnerability on Linux.
Red Hat published its CVE-2026-43720 entry, rating the WebKitGTK use-after-free vulnerability as Moderate severity with a CVSS v3.1 score of 6.5. Red Hat also listed fixed RHEL 7, 8, and 9 offerings and marked certain RHEL 6 packages as out of support scope.
Apple published CVE-2026-43720, describing a use-after-free issue in WebKit processing of maliciously crafted web content that can cause an unexpected Safari crash. The record notes the issue was addressed through improved memory management.
The CVE record for CVE-2026-43720 was updated after its initial publication. The record continued to reference fixes across Safari, iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS.
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Apple and Red Hat disclosed **CVE-2026-43727**, a use-after-free vulnerability in WebKit and WebKitGTK that can be triggered by maliciously crafted web content and cause an unexpected browser or process crash. The flaw is attributed to improper memory management and is tracked as `CWE-416`; Red Hat scored it **CVSS 6.5** and classified it as moderate severity, with impact focused on **availability** rather than confirmed code execution. Apple said the issue was fixed in Safari 26.5.2, iOS 18.7.10 and 26.5.2, iPadOS 18.7.10 and 26.5.2, macOS Tahoe 26.5.2, visionOS 26.6, and watchOS 26.6. Red Hat published fixes through multiple security errata for affected Red Hat Enterprise Linux 7, 8, and 9 offerings, while noting that Red Hat Enterprise Linux 6 packages are outside support scope and should be assumed affected if WebKitGTK is present.
Aug 24, 2026
Apple and Red Hat disclosed **CVE-2026-43663**, a moderate-severity `CWE-416` use-after-free flaw in WebKit/WebKitGTK caused by improper memory handling when processing maliciously crafted web content. The vulnerability can be triggered over the network with low attack complexity and no privileges, but it requires user interaction; vendors say successful exploitation can cause an unexpected process crash, creating a denial-of-service condition and potentially broader memory-corruption risks in some scenarios. Apple said it fixed the issue across Safari, iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS, while Red Hat reported remediation for multiple **RHEL 7, 8, and 9** product streams through security errata and related Bugzilla tracking. Red Hat assigned the flaw a **CVSS v3 score of 6.5** and noted that some older **RHEL 6** packages containing affected components fall outside support scope; the fix was described as improved memory handling in WebKitGTK.
Aug 24, 2026
Red Hat disclosed **CVE-2026-43742**, a moderate-severity use-after-free flaw in **WebKitGTK** caused by improper memory management when handling maliciously crafted web content. The bug can trigger an unexpected process crash and is tracked under **CWE-416** with a **CVSS v3.1 score of 6.5**; Red Hat noted that, in some circumstances, the weakness could also lead to memory corruption, memory disclosure, or potentially arbitrary code execution. The issue was addressed through improved memory management and aligns with Apple’s upstream description of the same vulnerability affecting WebKit-based platforms. Red Hat linked fixes for affected **Red Hat Enterprise Linux 7, 8, and 9** offerings to multiple `RHSA` advisories, while packages in **RHEL 6** containing `pywebkitgtk` and `webkitgtk` are out of support scope and should be assumed affected. The flaw is also referenced in **WebKitGTK Security Advisory `WSA-2026-0004`** and WebKit bug `315161`, and Apple’s CVE record says the same crafted-content issue affected Safari and several Apple operating systems before their respective patched versions.
Aug 24, 2026