What is CVE-2020-16039?

CVE-2020-16039 is a high-severity vulnerability in Google Chrome, classified under Use After Free. CVSS score: 8.8/10. Published 2021-01-08.

How severe is CVE-2020-16039?

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

Use After Free in Google Chrome

CVE-2020-16039

Use after free in extensions in Google Chrome prior to 87.0.4280.88 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Vulnerability class: Use-After-Free

Published 2021-01-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.012 (68.1th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Google Chrome — versions unspecified

Weakness classification (CWE)

References

chromereleases.googleblog.com/2020/12/stable-channel-update-for-desktop.html (Release Notes, Vendor Advisory)
crbug.com/1149177 (Permissions Required, Vendor Advisory)

Frequently asked questions

What is CVE-2020-16039?: CVE-2020-16039 is a high-severity vulnerability in Google Chrome, classified under Use After Free. CVSS score: 8.8/10. Published 2021-01-08.
How severe is CVE-2020-16039?: High severity. CVSS v3 base score is 8.8 out of 10.