Accessibility. A logic issue was addressed with improved checks.

------------------------------------------------------------------------ WebKitGTK and WPE WebKit Security Advisory WSA-2026-0005 ------------------------------------------------------------------------

Date reported : August 20, 2026 Advisory ID : WSA-2026-0005 WebKitGTK Advisory URL : https://webkitgtk.org/security/WSA-2026-0005.html WPE WebKit Advisory URL : https://wpewebkit.org/security/WSA-2026-0005.html CVE identifiers : CVE-2026-28984, CVE-2026-43804, CVE-2026-64713, CVE-2026-64719, CVE-2026-64728, CVE-2026-64730, CVE-2026-64757, CVE-2026-64783, CVE-2026-64787.

Several vulnerabilities were discovered in WebKitGTK and WPE WebKit.

CVE-2026-28984 Versions affected: WebKitGTK and WPE WebKit before 2.52.4. Credit to Artem Dinaburg of Trail of Bits via Anthropic CVD. Impact: Processing maliciously crafted web content may lead to an unexpected Safari crash. Description: The issue was addressed with improved memory handling. WebKit Bugzilla: 311883

CVE-2026-43804 Versions affected: WebKitGTK and WPE WebKit before 2.52.6. Credit to Heiko Kiesel of SEEMOO, TU Darmstadt. Impact: Visiting a website may lead to an app denial-of-service. Description: This issue was addressed through improved state management. WebKit Bugzilla: 316816

CVE-2026-64713 Versions affected: WebKitGTK and WPE WebKit before 2.52.6. Credit to Kwak Kiyong, Song Nuri. Impact: Websites may know if the user has visited a given link. Description: This issue was addressed with improved checks. WebKit Bugzilla: 316827

CVE-2026-64719 Versions affected: WebKitGTK and WPE WebKit before 2.52.6. Credit to Shaheen Fazim. Impact: Processing maliciously crafted web content may lead to an unexpected Safari crash. Description: An out-of-bounds access issue was addressed with improved bounds checking. WebKit Bugzilla: 319404

CVE-2026-64728 Versions affected: WebKitGTK and WPE WebKit before 2.52.6. Credit to an anonymous researcher. Impact: Maliciously crafted web content may violate iframe sandboxing policy. Description: A permissions issue was addressed with improved validation. WebKit Bugzilla: 313220

CVE-2026-64730 Versions affected: WebKitGTK and WPE WebKit before 2.52.6. Credit to Kagami Rosylight of Mozilla. Impact: Visiting a website that frames malicious content may lead to UI spoofing. Description: The issue was addressed with improved UI. WebKit Bugzilla: 311660

CVE-2026-64757 Versions affected: WebKitGTK and WPE WebKit before 2.52.6. Credit to Milad Nasr and Nicholas Carlini with Claude, Anthropic. Impact: Processing maliciously crafted web content may lead to an unexpected Safari crash. Description: A memory corruption issue was addressed with improved state management. WebKit Bugzilla: 315082

CVE-2026-64783 Versions affected: WebKitGTK and WPE WebKit before 2.52.6. Credit to 杉山 壮太, lattice, Behzad Najjarpour Jabbari (@G4ru), Junyeong Lee, Mooth.ai, OGINOME Tomohito, Using GLM From Z.AI, Gia Bui (@yabeow) from Calif.io. Impact: Processing maliciously crafted web content may lead to an unexpected Safari crash. Description: A use-after-free issue was addressed with improved memory management. WebKit Bugzilla: 313521

CVE-2026-64787 Versions affected: WebKitGTK and WPE WebKit before 2.52.5. Credit to 杉山 壮太, Shubham Chaskar. Impact: Processing maliciously crafted web content may lead to an unexpected process termination. Description: A use-after-free issue was addressed with improved memory management. WebKit Bugzilla: 313703

We recommend updating to the latest stable versions of WebKitGTK and WPE WebKit. It is the best way to ensure that you are running safe versions of WebKit. Please check our websites for information about the latest stable releases.

Further information about WebKitGTK and WPE WebKit security advisories can be found at: https://webkitgtk.org/security.html or https://wpewebkit.org/security.

The WebKitGTK and WPE WebKit team,

AMD. A memory corruption issue was addressed with improved input validation.

A code execution vulnerability exists in the AudioSourceProviderGStreamer functionality of Webkit WebKitGTK 2.30.1. A specially crafted web page can lead to a use after free.

A specially crafted web page can abuse this vulnerability to cause memory corruption and potentially arbitrary code execution. A user would need to visit a malicious webpage to trigger this vulnerability.

Reference: https://webkitgtk.org/security/WSA-2023-0009.html#CVE-2023-39928

A vulnerability was discovered in WebKitGTK's JIT compiler.

Accessibility. A logic issue was addressed with improved checks.

Accessibility. A privacy issue was addressed with improved private data redaction for log entries.

A memory corruption vulnerability was addressed with improved locking. This issue is fixed in iOS 17.1.2 and iPadOS 17.1.2, macOS Sonoma 14.1.2, Safari 17.1.2. Processing web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited against versions of iOS before iOS 16.7.1.

Airport. A permissions issue was addressed with improved redaction of sensitive information.

Accessibility. A privacy issue was addressed with improved private data redaction for log entries.

A type confusion issue was addressed with improved checks. This issue is fixed in iOS 16.5.1 and iPadOS 16.5.1, iOS 15.7.7 and iPadOS 15.7.7, macOS Ventura 13.4.1, Safari 16.5.1. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

A use-after-free issue was addressed with improved memory management. This issue is fixed in watchOS 9.5, tvOS 16.5, macOS Ventura 13.4, iOS 15.7.6 and iPadOS 15.7.6, Safari 16.5, iOS 16.5 and iPadOS 16.5. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

Accessibility. A privacy issue was addressed with improved private data redaction for log entries.

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.6.1 and iPadOS 15.6.1, macOS Monterey 12.5.1, Safari 15.6.1. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

A flaw was found in WebKitGTK. An integer overflow was addressed with improved input validation.

Reference: https://webkitgtk.org/security/WSA-2022-0001.html

A flaw was found in WebKitGTK.

Impact: A remote attacker may be able to cause arbitrary code execution. Description: A logic issue was addressed with improved restrictions.

Reference: https://webkitgtk.org/security/WSA-2021-0002.html

A flaw was found in WebKitGTK.

Impact: Processing maliciously crafted web content may lead to arbitrary code execution. Description: A type confusion issue was addressed with improved state handling.

Reference: https://webkitgtk.org/security/WSA-2021-0002.html

A logic issue was addressed with improved state management. This issue is fixed in iOS 13.3.1 and iPadOS 13.3.1, tvOS 13.3.1, Safari 13.0.5, iTunes for Windows 12.10.4, iCloud for Windows 11.0, iCloud for Windows 7.17. Processing maliciously crafted web content may lead to universal cross site scripting.

A vulnerability was found in WebKit. The flaw is triggered when processing maliciously crafted web content that may lead to arbitrary code execution. Improved memory handling addresses the multiple memory corruption issues.

WebKit. Multiple memory corruption issues were addressed through improved input validation.

WebKit. Multiple memory corruption issues were addressed through improved memory handling.

WebKit. A validation issue existed in the handling of page loading. This issue was addressed through improved logic.

WebKit. A validation issue existed in the handling of variable handling. This issue was addressed through improved validation.

WebKit. Multiple memory corruption issues were addressed through improved input validation.

WebKit. Multiple memory corruption issues were addressed through improved memory handling.

WebKit. A memory initialization issue was addressed through improved memory handling.

Kernel. A use after free issue was addressed through improved memory management.

WebKit. A prototype access issue was addressed through improved exception handling.

AirPort. A permissions issue was addressed with additional restrictions.