CVE-2020-3864 — webkitgtk: Non-unique security origin for DOM object contexts

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HIGH

webkitgtk: Non-unique security origin for DOM object contexts

Published Oct 27, 2020

7.8

HIGH

CVSS 3.1

EPSS 0.40%

Description

A logic issue was addressed with improved validation. This issue is fixed in iCloud for Windows 7.17, iTunes 12.10.4 for Windows, iCloud for Windows 10.9.2, tvOS 13.3.1, Safari 13.0.5, iOS 13.3.1 and iPadOS 13.3.1. A DOM object context may not have had a unique security origin.

Affected products

Vendor Apple Product Safari Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <13.0
Vendor Apple Product iCloud for Windows Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <10.9
- Version
  unspecified
  Status
  affected
  Constraints
  <7.17
Vendor Apple Product iOS and iPadOS Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <13.3
Vendor Apple Product iTunes for Windows Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <12.10
Vendor Apple Product tvOS Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <13.3

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Apple

Safari

n/a

Version	Status	Constraints
unspecified	affected	<13.0

Apple

iCloud for Windows

n/a

Version	Status	Constraints
unspecified	affected	<10.9
unspecified	affected	<7.17

Apple

iOS and iPadOS

n/a

Version	Status	Constraints
unspecified	affected	<13.3

Apple

iTunes for Windows

n/a

Version	Status	Constraints
unspecified	affected	<12.10

Apple

tvOS

n/a

Version	Status	Constraints
unspecified	affected	<13.3

Red Hat Enterprise Linux 7

webkitgtk4-0:2.28.2-2.el7

Fixed · RHSA-2020:4035
Red Hat Enterprise Linux 8

webkit2gtk3-0:2.28.4-1.el8

Fixed · RHSA-2020:4451
Red Hat Enterprise Linux 6

webkitgtk

Out of support scope
Red Hat Enterprise Linux 7

webkitgtk3

Will not fix

Product	Package	State	Advisory
Red Hat Enterprise Linux 7	webkitgtk4-0:2.28.2-2.el7	Fixed	RHSA-2020:4035
Red Hat Enterprise Linux 8	webkit2gtk3-0:2.28.4-1.el8	Fixed	RHSA-2020:4451
Red Hat Enterprise Linux 6	webkitgtk	Out of support scope	n/a
Red Hat Enterprise Linux 7	webkitgtk3	Will not fix	n/a

Remediation

No remediation recorded yet.

Metrics

0.40% 0.00404

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.00404

Score over time

2021–2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Table of values (11 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	0.40% (0.00404)	32.21th	v5 (v2026.06.15)
Sep 20, 2026	0.40% (0.00404)	34.44th	v5 (v2026.06.15)
Jul 20, 2024	0.04% (0.00045)	14.56th	v3 (v2023.03.01)
Jun 10, 2024	0.04% (0.00045)	14.07th	v3 (v2023.03.01)
Mar 7, 2023	0.04% (0.00045)	12.06th	v3 (v2023.03.01)
Mar 6, 2023	1.03% (0.01034)	41.69th	v2 (v2022.01.01)
Apr 1, 2022	1.03% (0.01034)	37.91th	v2 (v2022.01.01)
Feb 8, 2022	4.37% (0.04370)	70.76th	v2 (v2022.01.01)
Feb 4, 2022	3.26% (0.03255)	65.32th	v2 (v2022.01.01)
Feb 3, 2022	0.96% (0.00958)	25.99th	v5 (v2026.06.15)
Apr 14, 2021	0.21% (0.00215)	0.00th	v1

Weaknesses (1)

CWE-346

References (11)

https://access.redhat.com/security/cve/CVE-2020-3864
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1876518
Issue Tracking
https://nvd.nist.gov/vuln/detail/CVE-2020-3864
https://support.apple.com/en-us/HT210918
x_refsource_MISCRelease NotesVendor Advisory
https://support.apple.com/en-us/HT210920
x_refsource_MISCRelease NotesVendor Advisory
https://support.apple.com/en-us/HT210922
x_refsource_MISCRelease NotesVendor Advisory
https://support.apple.com/en-us/HT210923
x_refsource_MISCRelease NotesVendor Advisory
https://support.apple.com/en-us/HT210947
x_refsource_MISCRelease NotesVendor Advisory
https://support.apple.com/en-us/HT210948
x_refsource_MISCRelease NotesVendor Advisory
https://webkitgtk.org/security/WSA-2020-0002.html
https://www.cve.org/CVERecord?id=CVE-2020-3864

Link	Providers	Tags
https://access.redhat.com/security/cve/CVE-2020-3864		Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1876518		Issue Tracking
https://nvd.nist.gov/vuln/detail/CVE-2020-3864
https://support.apple.com/en-us/HT210918		x_refsource_MISCRelease NotesVendor Advisory
https://support.apple.com/en-us/HT210920		x_refsource_MISCRelease NotesVendor Advisory
https://support.apple.com/en-us/HT210922		x_refsource_MISCRelease NotesVendor Advisory
https://support.apple.com/en-us/HT210923		x_refsource_MISCRelease NotesVendor Advisory
https://support.apple.com/en-us/HT210947		x_refsource_MISCRelease NotesVendor Advisory
https://support.apple.com/en-us/HT210948		x_refsource_MISCRelease NotesVendor Advisory
https://webkitgtk.org/security/WSA-2020-0002.html
https://www.cve.org/CVERecord?id=CVE-2020-3864

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner apple

Published Oct 27, 2020

Updated Aug 4, 2024

Reserved Dec 18, 2019

Link CVE-2020-3864

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2020-3864

Red Hat

Severity Moderate

Public date Feb 14, 2020

Links CVE-2020-3864 - Bugzilla