Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2020-6399

19
FAUCET Score

CVE-2020-6399 describes an insufficient policy enforcement vulnerability in Google Chrome's AppCache, affecting versions prior to 80.0.3987.87, as well as related Google and OpenSUSE products. This medium-severity vulnerability (CVSS 6.5) allows a remote attacker to leak cross-origin data through a crafted HTML page, requiring user interaction but with high confidentiality impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion, though it received some media coverage upon Chrome 80's release.

Impacted Technologies

VendorProductVersion(s)CPE
< 80.0.3987.87CPE matchmatch criteria
cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
15.0CPE matchmatch criteria
cpe:2.3:a:opensuse:backports_sle:15.0:sp1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.99%
Probability of exploitation in next 30 days
EPSS Percentile
78.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0199 is in the 89th percentile among its peer group of 26,234 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6 SupplementaryFixed in: chromium-browser-0:80.0.3987.87-1.el6_10
View patch
googlevendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2020-6399Moderate

chromium-browser: Insufficient policy enforcement in AppCache

Feb 4, 2020

References

lists.opensuse.org / opensuse-security-announce/2020-02/msg00015.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2020-02/msg00025.html
access.redhat.com / errata/RHSA-2020:0514
chromereleases.googleblog.com / 2020/02/stable-channel-update-for-desktop.html
Vendor Advisory
crbug.com / 1039869
Permissions Required
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/6IOHSO6BUKC6I66J5PZOMAGFVJ66ZS57
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/X3B5RWJQD5LA45MYLLR55KZJOJ5NVZGP
security.gentoo.org / glsa/202003-08
debian.org / security/2020/dsa-4638