browser/browsing_data/browsing_data_remover.cc in Google Chrome before 51.0.2704.63 deletes HPKP pins during cache clearing, which makes it easier for remote attackers to spoof web sites via a valid certificate from an arbitrary recognized Certification Authority.
http://googlechromereleases.blogspot.com/2016/05/stable-channel-update_25.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00062.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00063.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00005.html
http://www.debian.org/security/2016/dsa-3590
http://www.securityfocus.com/bid/90876
http://www.securitytracker.com/id/1035981
https://access.redhat.com/errata/RHSA-2016:1190
Source: MITRE
Published: 2016-06-05
Updated: 2018-10-30
Type: CWE-284
Base Score: 4.3
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N
Impact Score: 2.9
Exploitability Score: 8.6
Severity: MEDIUM
Base Score: 5.3
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
Impact Score: 3.6
Exploitability Score: 1.6
Severity: MEDIUM