CVE-2025-9866HIGH 8.8EPSS p28.0%

CVE-2025-9866CVE-2025-9866

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)

Scoring

CVSS 3.18.8 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS0.35% probability of exploitation · percentile 28.0% · 2026-08-03T12:00:16Z
Published2025-09-03
Last modified2025-09-04

Underlying weaknesses· 1

CWE-693

References

  1. https://chromereleases.googleblog.com/2025/09/stable-channel-update-for-desktop.html
  2. https://issues.chromium.org/issues/379337758

1

TypeTargetConfidenceTier
WeaknessProtection Mechanism Failurecwe-6930%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.