------------------------------------------------------------------------ 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,

AirPort. A permissions issue was addressed with additional restrictions.

A correctness issue was addressed with improved checks. This issue is fixed in Safari 26, iOS 18.7 and iPadOS 18.7, iOS 26 and iPadOS 26, macOS Tahoe 26, tvOS 26, visionOS 26, watchOS 26. Processing maliciously crafted web content may lead to an unexpected process crash.

Accessibility. A logic issue was addressed with improved checks.

Accessibility. A logic issue was addressed with improved checks.

An attacker with arbitrary read and write capability may be able to bypass Pointer Authentication. Description: The issue was addressed with improved checks. WebKit Bugzilla: 272750

Versions affected: WebKitGTK and WPE WebKit before 2.44.2.

A malicious website may exfiltrate audio data cross-origin WebKit Bugzilla: 263795

A logic issue was addressed with improved validation. This issue is fixed in tvOS 17.4, macOS Sonoma 14.4, visionOS 1.1, iOS 17.4 and iPadOS 17.4, watchOS 10.4, iOS 16.7.6 and iPadOS 16.7.6, Safari 17.4. Processing maliciously crafted web content may prevent Content Security Policy from being enforced.

A maliciously crafted webpage may be able to fingerprint the user. WebKit Bugzilla: 266703

A logic issue was addressed with improved state management. This issue is fixed in tvOS 17.4, macOS Sonoma 14.4, visionOS 1.1, iOS 17.4 and iPadOS 17.4, watchOS 10.4, iOS 16.7.6 and iPadOS 16.7.6, Safari 17.4. Processing maliciously crafted web content may prevent Content Security Policy from being enforced.

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 logic issue was addressed with improved validation. This issue is fixed in macOS Ventura 13.3. Content Security Policy to block domains with wildcards may fail.

A use-after-free issue was addressed with improved memory management. This issue is fixed in iOS 16.4 and iPadOS 16.4, macOS Ventura 13.3. Processing web content may lead to arbitrary code execution.

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.

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

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 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 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 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.

A use-after-free issue exists in WebKitGTK before 2.28.1 and WPE WebKit before 2.28.1 via crafted web content that allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash).

accessibility/AXObjectCache.cpp in WebKit, as used in WebKitGTK through 2.26.4 and WPE WebKit through 2.26.4, allows a denial of service (application crash) because maintenance of the mdeferredFocusedNodeChange data structure mishandles removal.

Upstream patch:

https://trac.webkit.org/changeset/257292/webkit

Webkit-GTK 2.x (any version with HTML5 audio/video support based on GStreamer) allows remote attackers to trigger unexpectedly high sound volume via malicious javascript. NOTE: this WebKit-GTK behavior complies with existing W3C standards and existing practices for GNOME desktop integration.

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.

Array index error in the FEBlend::apply function in WebCore/platform/graphics/filters/FEBlend.cpp in WebKit, as used in Google Chrome before 7.0.517.44, webkitgtk before 1.2.6, and other products, allows remote attackers to cause a denial of service and possibly execute arbitrary code via a crafted SVG document, related to effects in the application of filters.

Common Vulnerabilities and Exposures assigned an identifier CVE-2010-4198 to the following vulnerability:

Name: CVE-2010-4198 Status: Candidate URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-4198 [Open URL] Assigned: 20101105 Reference: CONFIRM:http://code.google.com/p/chromium/issues/detail?id=55257 Reference: CONFIRM:http://googlechromereleases.blogspot.com/2010/11/stable-channel-update.html

Upstream Bugzilla: https://bugs.webkit.org/showbug.cgi?id=45611 Trac: http://trac.webkit.org/changeset/69801

Google Chrome before 7.0.517.44 does not properly handle large text areas, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted HTML document.

Common Vulnerabilities and Exposures assigned an identifier CVE-2010-4197 to the following vulnerability:

Name: CVE-2010-4197 Status: Candidate URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-4197 Assigned: 20101105 Reference: CONFIRM:http://code.google.com/p/chromium/issues/detail?id=51602 Reference: CONFIRM:http://googlechromereleases.blogspot.com/2010/11/stable-channel-update.html

Upstream Bugzilla: https://bugs.webkit.org/showbug.cgi?id=48349 Trac: http://trac.webkit.org/changeset/70594

Use-after-free vulnerability in Google Chrome before 7.0.517.44 allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors involving text editing.

Common Vulnerabilities and Exposures assigned an identifier CVE-2010-4204 to the following vulnerability:

Name: CVE-2010-4204 Status: Candidate URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-4204 Assigned: 20101105 Reference: CONFIRM:http://code.google.com/p/chromium/issues/detail?id=60238 Reference: CONFIRM:http://googlechromereleases.blogspot.com/2010/11/stable-channel-update.html Upstream Bugzilla: https://bugs.webkit.org/showbug.cgi?id=48281 Trac: http://trac.webkit.org/changeset/70517

Google Chrome before 7.0.517.44 accesses a frame object after this object has been destroyed, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via unknown vectors.

iCommon Vulnerabilities and Exposures assigned an identifier CVE-2010-3114 to the following vulnerability:

Name: CVE-2010-3114 URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-3114 Assigned: 20100824 Reference: CONFIRM: http://code.google.com/p/chromium/issues/detail?id=49628 Reference: CONFIRM: http://googlechromereleases.blogspot.com/2010/08/stable-channel-update19.html

The text-editing implementation in Google Chrome before 5.0.375.127 does not properly perform casts, which has unspecified impact and attack vectors.

This flaw also affects upstream WebKit:

https://bugs.webkit.org/showbug.cgi?id=42655 http://trac.webkit.org/changeset/63773

Google Chrome before 5.0.375.127, and webkitgtk before 1.2.6, does not properly implement the history feature, which might allow remote attackers to spoof the address bar via unspecified vectors.