CVE-2021-21126

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CVSS 3.1

6.5 medium

EPSS

9%p95

Published

Feb 9, 2021 (Feb 9, 2021)

Modified

Jun 17, 2026

Description

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.

Vendors: google microsoft
Products: chrome, edge chromium
Weakness: CWE-20
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

NVD CVE.org GitHub PoCs EPSS (8.7%)

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