What is CVE-2018-16086?

CVE-2018-16086 is a medium-severity vulnerability in Google Chrome, classified under Improper Authorization. CVSS score: 5.4/10. Published 2019-06-27.

How severe is CVE-2018-16086?

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

Auth bypass in Google Chrome

CVE-2018-16086

Insufficient policy enforcement in extensions API in Google Chrome prior to 69.0.3497.81 allowed an attacker who convinced a user to install a malicious extension to bypass navigation restrictions via a crafted Chrome Extension.

Published 2019-06-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (37.4th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: -0.000

Affected products

Google Chrome — versions unspecified

Weakness classification (CWE)

CWE-285 — Improper Authorization

References

Frequently asked questions

What is CVE-2018-16086?: CVE-2018-16086 is a medium-severity vulnerability in Google Chrome, classified under Improper Authorization. CVSS score: 5.4/10. Published 2019-06-27.
How severe is CVE-2018-16086?: Medium severity. CVSS v3 base score is 5.4 out of 10.