CVE-2025-9866

HIGH

Google Chrome <140.0.7339.80 - Auth Bypass

Title source: llm

Description

Inappropriate implementation in Extensions in Google Chrome prior to 140.0.7339.80 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chromium security severity: Medium)

References (2)

Core 2

Core References

Release Notes

https://chromereleases.googleblog.com/2025/09/stable-channel-update-for-desktop.html

Issue Tracking, Permissions Required

https://issues.chromium.org/issues/379337758

Scores

CVSS v3 8.8

EPSS 0.0035

EPSS Percentile 26.9%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-693

Status published

Products (1)

google/chrome < 140.0.7339.80

Published Sep 03, 2025

Tracked Since Feb 18, 2026