What is CVE-2026-84325?

CVE-2026-84325 is a critical-severity vulnerability in Google Chrome, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2026-09-02.

How severe is CVE-2026-84325?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Improper input validation in Google Chrome

CVE-2026-84325

Improper input validation in DataTransfer in Google Chrome prior to 152.0.7977.75 allowed a remote attacker leveraging social engineering to bypass system access restrictions via a co-installed app. (Chromium security severity: High)

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2026-09-02 · last modified 2026-09-03.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (32.9th percentile), scored 2026-10-17.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002

Affected products

Google Chrome

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop.html (Release Notes, Vendor Advisory)
issues.chromium.org/issues/553117928 (Permissions Required)

Frequently asked questions

What is CVE-2026-84325?: CVE-2026-84325 is a critical-severity vulnerability in Google Chrome, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2026-09-02.
How severe is CVE-2026-84325?: Critical severity. CVSS v3 base score is 9.8 out of 10.