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Fencer Vulns
medium 6.5

CVE-2020-6499 json

Inappropriate implementation in AppCache in Google Chrome prior to 80.0.3987.87 allowed a remote attacker to bypass AppCache security restr…

published 2020-06-03 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-27649

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits
0
none known

Summary

Inappropriate implementation in AppCache in Google Chrome prior to 80.0.3987.87 allowed a remote attacker to bypass AppCache security restrictions via a crafted HTML page.

Patch / fix

  • Google Chrome 80.0.3987.87
  • chromium Debian 14, Debian 13, Debian 12 80.0.3987.106-1

debian advisories DEBIAN-CVE-2020-6499

  • chromium-browser Ubuntu 16.04 LTS 80.0.3987.87-0ubuntu0.16.04.1
  • chromium-browser Ubuntu 18.04 LTS 80.0.3987.87-0ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2020-6499

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • chromium-browser RHEL 6 EXTRAS 80.0.3987.87-1.el6_10

red hat advisories RHSA-2020:0514

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-6499 updated cvss 6.5

chromium-browser: Inappropriate implementation in AppCache

  • Red Hat Enterprise Linux Desktop Supplementary (v. 6) chromium-browser 80.0.3987.87-1.el6_10 Red Hat Enterprise Linux HPC Node Supplementary (v. 6) chromium-browser 80.0.3987.87-1.el6_10 Red Hat Enterprise Linux Server Supplementary (v. 6) chromium-browser 80.0.3987.87-1.el6_10 Red Hat Enterprise Linux Workstation Supplementary (v. 6) chromium-browser 80.0.3987.87-1.el6_10
    fixed: vendor fix RHSA-2020:0514

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.70% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

  • Google Chrome

Classification

Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.