About the security content of Safari 15.1
This document describes the security content of Safari 15.1.
About Apple security updates
For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available. Recent releases are listed on the Apple security updates page.
Apple security documents reference vulnerabilities by CVE-ID when possible.
For more information about security, see the Apple Product Security page.
Safari 15.1
WebKit
Available for: macOS Big Sur and macOS Catalina
Impact: Processing maliciously crafted web content may lead to code execution
Description: A type confusion issue was addressed with improved memory handling.
CVE-2021-31008
WebKit
Available for: macOS Big Sur and macOS Catalina
Impact: Processing maliciously crafted web content may lead to unexpectedly unenforced Content Security Policy
Description: A logic issue was addressed with improved restrictions.
CVE-2021-30887: Narendra Bhati (@imnarendrabhati) of Suma Soft Pvt. Ltd.
WebKit
Available for: macOS Big Sur and macOS Catalina
Impact: A malicious website using Content Security Policy reports may be able to leak information via redirect behavior
Description: An information leakage issue was addressed.
CVE-2021-30888: Prakash (@1lastBr3ath)
WebKit
Available for: macOS Big Sur and macOS Catalina
Impact: Processing maliciously crafted web content may lead to arbitrary code execution
Description: A buffer overflow issue was addressed with improved memory handling.
CVE-2021-30889: Chijin Zhou of ShuiMuYuLin Ltd and Tsinghua wingtecher lab
WebKit
Available for: macOS Big Sur and macOS Catalina
Impact: Processing maliciously crafted web content may lead to universal cross site scripting
Description: A logic issue was addressed with improved state management.
CVE-2021-30890: an anonymous researcher
Additional recognition
WebKit
We would like to acknowledge Ivan Fratric of Google Project Zero, Pavel Gromadchuk, and an anonymous researcher for their assistance.
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