What is CVE-2018-17478?

CVE-2018-17478 is a high-severity vulnerability in Google Chrome, classified under Improper Validation of Array Index. CVSS score: 8.8/10. Published 2019-06-27.

How severe is CVE-2018-17478?

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

Vulnerability in Google Chrome

CVE-2018-17478

Incorrect array position calculations in V8 in Google Chrome prior to 70.0.3538.102 allowed a remote attacker to potentially exploit object corruption via a crafted HTML page.

Published 2019-06-27 · 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: 0.011 (64.4th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: -0.000

Affected products

Google Chrome — versions unspecified

Weakness classification (CWE)

CWE-129 — Improper Validation of Array Index

References

Frequently asked questions

What is CVE-2018-17478?: CVE-2018-17478 is a high-severity vulnerability in Google Chrome, classified under Improper Validation of Array Index. CVSS score: 8.8/10. Published 2019-06-27.
How severe is CVE-2018-17478?: High severity. CVSS v3 base score is 8.8 out of 10.