Is CVE-2019-8506 in the CISA KEV catalog?

Yes. CVE-2019-8506 is on the CISA Known Exploited Vulnerabilities list, added 2022-05-04.

What is the CVSS severity of CVE-2019-8506?

CVE-2019-8506 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2019-8506?

CVE-2019-8506 has an EPSS score of 18.11% (97th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-8506?

Upgrade webkit2gtk on debian 11 to 2.24.1-1 or later. Fixes are available for 7 affected products.

CVE & CISA-KEV Catalog

CVE-2019-8506

HIGHCISA KEVEPSS 97th pctl

8.8

CVSS v3

NVD

Description

A type confusion issue was addressed with improved memory handling. This issue is fixed in iOS 12.2, tvOS 12.2, watchOS 5.2, Safari 12.1, iTunes 12.9.4 for Windows, iCloud for Windows 7.11. Processing maliciously crafted web content may lead to arbitrary code execution.

CWE-843Type Confusion

How to fix

Remediation Available

webkit2gtkDebian

Fixed in:2.24.1-1CVE-2019-8506

libjavascriptcoregtk-4.0-18Ubuntu

Fixed in:2.24.1-0ubuntu0.18.04.1USN-3948-1

libwebkit2gtk-4.0-37Ubuntu

Fixed in:2.24.1-0ubuntu0.18.04.1USN-3948-1

webkit2gtkUbuntu

Fixed in:2.24.1-0ubuntu0.18.04.1USN-3948-1

SafariWindows application

Affected:12.1Fixed in:12.1Apple Inc.

iCloud (Legacy)Windows application

Affected:7.11Fixed in:7.11Apple Inc.

iTunesWindows application

Affected:12.9.4Fixed in:12.9.4Apple Inc.

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

18.11%probability of exploitation in 30 days

97thpercentile

Very high risk: more likely to be exploited than 97% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Apple Multiple Products Type Confusion Vulnerability

A type confusion issue affecting multiple Apple products allows processing of maliciously crafted web content, leading to arbitrary code execution.

Apply updates per vendor instructions.

Remediation due: 2022-05-25

References

Vendor Advisory6

Government Resource1

cisa.gov

Related Vulnerabilities

Other CWE-843 (Type Confusion) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2011-0611	High	8.8	99%	KEV	Fix
CVE-2012-0507	Critical	9.8	98%	KEV + Ransom	-
CVE-2017-8291	High	7.8	97%	KEV	Fix
CVE-2019-0752	High	7.5	82%	KEV + Ransom	-
CVE-2017-0037	High	8.1	80%	KEV	-
CVE-2016-7201	High	8.8	80%	KEV	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-23.