A webkit2gtk security update has been released for Debian GNU/Linux 10 to address multiple vulnerabilities.

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Debian Security Advisory DSA-4627-1 security@debian.org
  https://www.debian.org/security/ Alberto Garcia
February 17, 2020   https://www.debian.org/security/faq
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Package : webkit2gtk
CVE ID : CVE-2020-3862 CVE-2020-3864 CVE-2020-3865 CVE-2020-3867
CVE-2020-3868

The following vulnerabilities have been discovered in the webkit2gtk
web engine:

CVE-2020-3862

Srikanth Gatta discovered that a malicious website may be able to
cause a denial of service.

CVE-2020-3864

Ryan Pickren discovered that a DOM object context may not have had
a unique security origin.

CVE-2020-3865

Ryan Pickren discovered that a top-level DOM object context may
have incorrectly been considered secure.

CVE-2020-3867

An anonymous researcher discovered that processing maliciously
crafted web content may lead to universal cross site scripting.

CVE-2020-3868

Marcin Towalski discovered that processing maliciously crafted web
content may lead to arbitrary code execution.

For the stable distribution (buster), these problems have been fixed in
version 2.26.4-1~deb10u1.

We recommend that you upgrade your webkit2gtk packages.

For the detailed security status of webkit2gtk please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/webkit2gtk

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://www.debian.org/security/