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Apple and Red Hat disclosed CVE-2026-43740, a moderate-severity use-after-free vulnerability in WebKit-derived web content processing that can let maliciously crafted pages disclose process memory. The flaw stems from improper memory handling, is mapped to CWE-416, and requires user interaction but no privileges, with Red Hat assigning a CVSS v3.1 score of 6.5 and noting a network attack vector and low attack complexity.
Apple said the issue was fixed in Safari 26.5.2, iOS 26.5.2, iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, and watchOS 26.6. Red Hat said affected WebKitGTK packages were addressed through multiple advisories for Red Hat Enterprise Linux 7, 8, and 9 product streams, while RHEL 6 packages are outside support scope and should be assumed affected.
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8 events from the most recent confirmed update back to the earliest known activity.
Red Hat issued 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, marking those streams fixed for CVE-2026-43740.
Red Hat issued RHSA-2026:57348 for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and 8.4 Extended Update Support Long-Life Add-On, marking both streams fixed for CVE-2026-43740.
Red Hat issued 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, marking both streams fixed for CVE-2026-43740.
Red Hat last modified its CVE-2026-43740 record, reflecting updated tracking information for the WebKitGTK vulnerability.
Red Hat issued RHSA-2026:42088 for Red Hat Enterprise Linux 8 and RHSA-2026:42062 for Red Hat Enterprise Linux 9, marking those product streams fixed for CVE-2026-43740.
Red Hat published its CVE-2026-43740 entry for a moderate-severity use-after-free flaw in WebKitGTK that can disclose process memory when processing malicious web content. Red Hat mapped the issue to CWE-416 and assigned CVSS 6.5.
Apple, as CNA, published CVE-2026-43740 describing an improper memory handling flaw that can let maliciously crafted web content disclose process memory. The record notes fixes across Safari, iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS releases.
The CVE record for CVE-2026-43740 was updated after its initial publication. The entry continued to identify Apple as CNA and retained the cross-platform fix information.
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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
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