Exploited. On CISA's list since 2022-05-23.
WebKitGTK Memory Corruption Vulnerability
CVE-2019-8720 · WebKitGTK WebKitGTK · Published 2023-03-06
How bad would it be?
8.8 out of 10
CVSS rates it high.
How likely is it to be used?
1.6%
Estimated chance of exploitation in the next 30 days, higher than 75% of all scored flaws (EPSS, 2026-10-29).
Is it already being used?
Yes
CISA has seen it exploited in real attacks. For US government agencies the fix is deadline passed 1600 days ago (2022-06-13).
What CISA says to do
Apply updates per vendor instructions.
WebKitGTK contains a memory corruption vulnerability which can allow an attacker to perform remote code execution.
What the flaw is
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.
From the NVD.
Fixes and advisories
Learn this
Explore this week’s weaknesses and all learning topics
Understand the kind of weakness behind this flaw. These resources teach the weakness, rather than reproduce this specific CVE. Follow the vendor's advice above to fix the affected product.
CWE-119 · CISA KEV; NVD record: nvd@nist.gov; NVD record: secalert@redhat.com. We have not selected a close learning match for this label.
CWE is a catalogue of weakness types. Labels come from the sources shown and can differ or change. Resource matches reviewed 16 October 2026.
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Exploited flaws from CISA's KEV catalogue. Chance of exploitation from EPSS by FIRST. Descriptions and scores from the NVD. This product uses the NVD API but is not endorsed or certified by the NVD.