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Apple and Red Hat disclosed fixes for CVE-2026-43745, an out-of-bounds write in WebKit and WebKitGTK caused by improper input validation. The flaw allows maliciously crafted web content to trigger an unexpected browser or process crash, with Apple specifically noting Safari impact and Red Hat classifying the issue as moderate severity with a CVSS v3.1 score of 6.5. The weakness is tracked as CWE-787.
Apple said the vulnerability was addressed through improved input validation in Safari 26.5.2 and in updates spanning iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS. Red Hat linked the same issue to WebKitGTK packages affecting RHEL 7, 8, and 9, publishing multiple RHSA advisories for supported offerings, while noting that RHEL 6 is outside support scope and should be assumed affected.
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9 events from the most recent confirmed update back to the earliest known activity.
Red Hat last modified its CVE page for CVE-2026-43745, reflecting an update to the vendor's public tracking information for the flaw.
Red Hat issued RHSA-2026:42088 for Red Hat Enterprise Linux 8 and RHSA-2026:42062 for Red Hat Enterprise Linux 9 to address CVE-2026-43745.
Red Hat Bugzilla recorded CVE-2026-43745 as bug 2500540, tracking the WebKitGTK vulnerability as a medium-severity issue affecting Linux.
Red Hat made its CVE entry public for CVE-2026-43745, classifying the WebKitGTK flaw as Moderate severity and noting that improper input validation could lead to an out-of-bounds write and process crash.
Apple's CVE record for CVE-2026-43745 was published, describing an out-of-bounds write in WebKit-related content handling that could let maliciously crafted web content crash Safari.
Red Hat published RHSA-2026:58564 for Red Hat Enterprise Linux 7 Extended Lifecycle Support and RHSA-2026:58550 for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions to address CVE-2026-43745.
Red Hat issued RHSA-2026:57348 to fix CVE-2026-43745 for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; the same advisory also covered the 8.4 Extended Update Support Long-Life Add-On offering.
Red Hat published RHSA-2026:54634 for Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions and RHSA-2026:54572 for Red Hat Enterprise Linux 9.6 Extended Update Support to remediate CVE-2026-43745.
The CVE record for CVE-2026-43745 was updated after publication, continuing Apple's public documentation of the vulnerability and fixes.
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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-2026-43720**, 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**.
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