CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Lifecycle Timeline
4Description
Policy bypass in ServiceWorkers in Google Chrome prior to 147.0.7727.55 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chromium security severity: Low)
Analysis
Content security policy bypass in Google Chrome prior to version 147.0.7727.55 allows remote attackers to bypass CSP protections via ServiceWorker policy manipulation when users interact with crafted HTML pages. The vulnerability requires user interaction (UI:R in CVSS) and results in integrity impact only; EPSS exploitation probability is minimal at 0.02%, and Chromium rates the security severity as low despite the policy bypass nature.
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External POC / Exploit Code
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EUVD-2026-20742
GHSA-vmw5-396h-99jh