CVE-2021-21126: Insufficient policy enforcement in extensions
Insufficient policy enforcement in extensions in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to bypass site isolation via a crafted Chrome Extension.
Credit
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Google Chrome (Trace Event)to a version that resolves this vulnerability.Fixed in 88.0.4324.96 - Upgrade
Upgrade
alpine/qt5-qtwebengineto a version that resolves this vulnerability.Fixed in 5.15.3_git20200401-r0
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
- CVE-2021-21117
- CVE-2021-21118
- CVE-2021-21119
- CVE-2021-21120
- CVE-2021-21121
- CVE-2021-21122
- CVE-2021-21123
- CVE-2021-21124
- CVE-2021-21125
- CVE-2020-16044
- CVE-2021-21127
- CVE-2021-21128
- CVE-2021-21129
- CVE-2021-21130
- CVE-2021-21131
- CVE-2021-21132
- CVE-2021-21133
- CVE-2021-21134
- CVE-2021-21135
- CVE-2021-21136
- CVE-2021-21137
- CVE-2021-21138
- CVE-2021-21139
- CVE-2021-21140
- CVE-2021-21141
Frequently Asked Questions
What is the vulnerability ID of this security issue?
The vulnerability ID of this security issue is CVE-2021-21126.
What is the severity of CVE-2021-21126?
The severity of CVE-2021-21126 is medium (6.5).
Which software versions are affected by CVE-2021-21126?
Google Chrome versions prior to 88.0.4324.96 and Microsoft Edge Chromium versions prior to 88.0.705.50 are affected by CVE-2021-21126.
What is the impact of CVE-2021-21126?
CVE-2021-21126 allows a remote attacker to bypass site isolation through a crafted Chrome Extension.
How can I fix CVE-2021-21126?
Update Google Chrome to version 88.0.4324.96 or later, and update Microsoft Edge Chromium to version 88.0.705.50 or later to fix CVE-2021-21126.