What is CVE-2020-6505?

CVE-2020-6505 is a critical-severity vulnerability in Google Chrome, classified under Use After Free. CVSS score: 9.6/10. Published 2020-07-22.

How severe is CVE-2020-6505?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Use After Free in Google Chrome

CVE-2020-6505

Use after free in speech in Google Chrome prior to 83.0.4103.106 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page.

Vulnerability class: Use-After-Free

Published 2020-07-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (60.9th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Google Chrome — versions unspecified

Weakness classification (CWE)

CWE-416 — Use After Free

References

crbug.com/1081350 (Third Party Advisory, Issue Tracking)
chromereleases.googleblog.com/2020/06/stable-channel-update-for-desktop_15.html (Vendor Advisory)
security.gentoo.org/glsa/202007-08 (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2020-6505?: CVE-2020-6505 is a critical-severity vulnerability in Google Chrome, classified under Use After Free. CVSS score: 9.6/10. Published 2020-07-22.
How severe is CVE-2020-6505?: Critical severity. CVSS v3 base score is 9.6 out of 10.