What is CVE-2018-6056?

CVE-2018-6056 is a high-severity vulnerability in Google Chrome, classified under Incorrect Type Conversion or Cast. CVSS score: 8.8/10. Published 2019-01-09.

How severe is CVE-2018-6056?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2018-6056 known to be exploited?

7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Google Chrome

CVE-2018-6056

Type confusion could lead to a heap out-of-bounds write in V8 in Google Chrome prior to 64.0.3282.168 allowing a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page.

Published 2019-01-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.093 (95.2th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.093 · newest: 0.093 · change: 0.000

Affected products

Google Chrome — versions unspecified
Debian Linux — versions 8.0, 9.0
Red Hat Enterprise Linux Desktop — versions 6.0
Red Hat Enterprise Linux Server — versions 6.0
Red Hat Enterprise Linux Workstation — versions 6.0

Weakness classification (CWE)

CWE-704 — Incorrect Type Conversion or Cast

Public proof-of-concept exploits

References

crbug.com/806388
chromereleases.googleblog.com/2018/02/stable-channel-update-for-desktop_13.html
www.securityfocus.com/bid/103003 (vdb-entry)
access.redhat.com/errata/RHSA-2018:0334 (vendor-advisory)
www.debian.org/security/2018/dsa-4182 (vendor-advisory)

Frequently asked questions

What is CVE-2018-6056?: CVE-2018-6056 is a high-severity vulnerability in Google Chrome, classified under Incorrect Type Conversion or Cast. CVSS score: 8.8/10. Published 2019-01-09.
How severe is CVE-2018-6056?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2018-6056 known to be exploited?: 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.