What is CVE-2026-13984?

CVE-2026-13984 is a medium-severity vulnerability in Google Chrome, classified under Authentication Bypass by Spoofing. CVSS score: 4.3/10. Published 2026-06-30.

How severe is CVE-2026-13984?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Google Chrome

CVE-2026-13984

Incorrect security UI in TabStrip in Google Chrome prior to 150.0.7871.47 allowed a remote attacker to perform UI spoofing via a crafted HTML page. (Chromium security severity: Medium)

Published 2026-06-30 · last modified 2026-07-02.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (13.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 13.1% 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: 0.002 · change: 0.000

Affected products

Google Chrome — versions 150.0.7871.47

Weakness classification (CWE)

References

chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0175352… (Release Notes)
issues.chromium.org/issues/514010404 (Permissions Required)

Frequently asked questions

What is CVE-2026-13984?: CVE-2026-13984 is a medium-severity vulnerability in Google Chrome, classified under Authentication Bypass by Spoofing. CVSS score: 4.3/10. Published 2026-06-30.
How severe is CVE-2026-13984?: Medium severity. CVSS v3 base score is 4.3 out of 10.