CVE-2020-6391

Name: CVE-2020-6391
Creator: NVD / NIST
Published: 2020-02-11T15:15:12.647+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 1.33%

Last modified Jun 17, 2026

CVE-2020-6391 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. Insufficient validation of untrusted input in Blink in Google Chrome prior to 80.0.3987.87 allowed a local attacker to bypass content security policy via a crafted HTML page.. EPSS estimates a 1.33% chance of exploitation in the next 30 days.

Description

Insufficient validation of untrusted input in Blink in Google Chrome prior to 80.0.3987.87 allowed a local attacker to bypass content security policy via a crafted HTML page.

Metrics

CVSS 3.1

4.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

EPSS Probability

1.33%

67.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions	Update
Google	Chrome	< 80.0.3987.87	—
Opensuse	Backports Sle	15.0	Sp1
Fedoraproject	Fedora	30	—
Fedoraproject	Fedora	31	—
Debian	Debian Linux	9.0	—
Debian	Debian Linux	10.0	—
Suse	Package Hub	All versions	—
Redhat	Enterprise Linux Desktop	6.0	—
Redhat	Enterprise Linux Server	6.0	—
Redhat	Enterprise Linux Workstation	6.0	—

References

http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00015.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00025.htmlMailing List, Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0514Third Party Advisory
https://chromereleases.googleblog.com/2020/02/stable-channel-update-for-desktop.htmlVendor Advisory
https://crbug.com/1017871Exploit, Issue Tracking, Patch, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IOHSO6BUKC6I66J5PZOMAGFVJ66ZS57/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X3B5RWJQD5LA45MYLLR55KZJOJ5NVZGP/
https://security.gentoo.org/glsa/202003-08Third Party Advisory
https://www.debian.org/security/2020/dsa-4638Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00015.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00025.htmlMailing List, Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0514Third Party Advisory
https://chromereleases.googleblog.com/2020/02/stable-channel-update-for-desktop.htmlVendor Advisory
https://crbug.com/1017871Exploit, Issue Tracking, Patch, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IOHSO6BUKC6I66J5PZOMAGFVJ66ZS57/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X3B5RWJQD5LA45MYLLR55KZJOJ5NVZGP/
https://security.gentoo.org/glsa/202003-08Third Party Advisory
https://www.debian.org/security/2020/dsa-4638Third Party Advisory

Timeline

Published: Feb 11, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-6391?

Insufficient validation of untrusted input in Blink in Google Chrome prior to 80.0.3987.87 allowed a local attacker to bypass content security policy via a crafted HTML page.

How severe is CVE-2020-6391?

CVE-2020-6391 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 1.33% probability of exploitation in the next 30 days.

How do I fix CVE-2020-6391?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-6391?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST