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A high-severity vulnerability, tracked as CVE-2025-66287, was identified in WebKitGTK, where processing maliciously crafted web content can result in an unexpected process crash due to improper memory handling. The flaw is remotely exploitable and has been acknowledged by security advisories, with a CVSS score of 8.8, indicating significant risk if left unpatched.
The issue affects WebKitGTK and WPE WebKit versions prior to 2.50.3, and was addressed by improving memory handling in the affected code. Security advisories recommend updating to the latest stable versions to mitigate the risk. The vulnerability was credited to Stanislav Fort of Aisle Research and is part of a broader set of issues disclosed in the same advisory, but CVE-2025-66287 specifically concerns process crashes triggered by malicious web content.
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CVE tracking sources documented CVE-2025-66287 as a remotely exploitable WebKitGTK vulnerability with CVSS 8.8, requiring user interaction but no privileges. The published guidance recommended updating WebKitGTK to the latest version and applying available security patches.
WebKitGTK and WPE WebKit published security advisory WSA-2025-0009 covering CVE-2025-66287, a high-severity buffer overflow issue triggered by processing maliciously crafted web content. The flaw can cause unexpected process crashes and may affect confidentiality, integrity, and availability.
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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
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-2026-43720**, 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