What is CVE-2026-84330?

CVE-2026-84330 is a medium-severity vulnerability in Google Chrome, classified under User Interface (UI) Misrepresentation of Critical Information. CVSS score: 5.4/10. Published 2026-09-02.

How severe is CVE-2026-84330?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Vulnerability in Google Chrome

CVE-2026-84330

UI misrepresentation in FullScreen in Google Chrome on on Android prior to 152.0.7977.75 allowed a remote attacker to spoof address bar via a crafted HTML page. (Chromium security severity: Medium)

Published 2026-09-02 · last modified 2026-09-08.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L.

EPSS exploit prediction

EPSS: 0.003 (15.9th percentile), scored 2026-10-17.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.9% 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: 0.003 · change: +0.001

Affected products

Google Chrome

Weakness classification (CWE)

CWE-451 — User Interface (UI) Misrepresentation of Critical Information

References

chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop.html (Release Notes, Vendor Advisory)
issues.chromium.org/issues/517091927 (Permissions Required)

Frequently asked questions

What is CVE-2026-84330?: CVE-2026-84330 is a medium-severity vulnerability in Google Chrome, classified under User Interface (UI) Misrepresentation of Critical Information. CVSS score: 5.4/10. Published 2026-09-02.
How severe is CVE-2026-84330?: Medium severity. CVSS v3 base score is 5.4 out of 10.