Apple Multiple Products Type Confusion Vulnerability

HIGH 8.8EXPLOITED (CISA KEV)CVE-2021-1789 · Published 02/04/2021 · updated 17/06/2026

Apple Multiple Products Type Confusion Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 04/05/2022. Patch affected systems as an emergency.

Package	Affected versions	Patched versions
webkitgtk webkitgtk	`< 2.30.6`	`2.30.6`

Description

A type confusion issue was addressed with improved state handling. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, tvOS 14.4, watchOS 7.3, iOS 14.4 and iPadOS 14.4, Safari 14.0.3. Processing maliciously crafted web content may lead to arbitrary code execution.

References

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JN6ZOD62CTO54CHTMJTHVEF6R2Y532TJ · Broken Link
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3L6ZZOU5JS7E3RFYGLP7UFLXCG7TNLU · Broken Link
security.gentoo.org/glsa/202104-03 · Third Party Advisory
support.apple.com/en-us/HT212146 · Release Notes
support.apple.com/en-us/HT212147 · Release Notes
support.apple.com/en-us/HT212148 · Release Notes
support.apple.com/en-us/HT212149 · Release Notes
support.apple.com/en-us/HT212152 · Release Notes
cisa.gov/known-exploited-vulnerabilities-catalog · US Government Resource
CISA KEV · CVE-2021-1789

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