CVE-2020-6391

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-02-11 · updated 2026-06-17
Weakness: CWE-79

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.

Affected products

Debian Linux: 9.0, 10.0
Fedoraproject Fedora: 30, 31
Google Chrome: before 80.0.3987.87 — fixed in 80.0.3987.87
openSUSE Backports Sle: 15.0-sp1
RedHat Enterprise Linux Desktop: 6.0
RedHat Enterprise Linux Server: 6.0
RedHat Enterprise Linux Workstation: 6.0
SUSE Package Hub: all versions

How to fix

Upgrade to a fixed version: Google Chrome 80.0.3987.87. Check the vendor advisory for mitigations.

References

http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00015.html
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00025.html
https://access.redhat.com/errata/RHSA-2020:0514
https://chromereleases.googleblog.com/2020/02/stable-channel-update-for-desktop.html
https://crbug.com/1017871
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/202003-08
https://www.debian.org/security/2020/dsa-4638
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00015.html
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00025.html
https://access.redhat.com/errata/RHSA-2020:0514

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