What is CVE-2018-6159?

CVE-2018-6159 is a medium-severity vulnerability in Google Chrome, classified under Information Disclosure. CVSS score: 6.5/10. Published 2019-06-27.

How severe is CVE-2018-6159?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Information disclosure in Google Chrome

CVE-2018-6159

Insufficient policy enforcement in ServiceWorker in Google Chrome prior to 68.0.3440.75 allowed a remote attacker to obtain potentially sensitive information from process memory via a crafted HTML page.

Vulnerability class: Information Disclosure

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

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.008 (54.1th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: -0.000

Affected products

Google Chrome — versions unspecified

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

Frequently asked questions

What is CVE-2018-6159?: CVE-2018-6159 is a medium-severity vulnerability in Google Chrome, classified under Information Disclosure. CVSS score: 6.5/10. Published 2019-06-27.
How severe is CVE-2018-6159?: Medium severity. CVSS v3 base score is 6.5 out of 10.