CVE-2026-20665
published 2026-03-25CVE-2026-20665: This issue was addressed through improved state management. This issue is fixed in Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS…
PriorityP336medium6.5CVSS 3.1
AVNACLPRNUINSUCLINAL
EPSS
0.61%
45.2th percentile
This issue was addressed through improved state management. This issue is fixed in Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4. Processing maliciously crafted web content may prevent Content Security Policy from being enforced.
Affected
14 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apple | ios_and_ipados | < 18.7.7 | 18.7.7 |
| apple | ios_and_ipados | < 26.4 | 26.4 |
| apple | ipados | < 18.7.7 | 18.7.7 |
| apple | ipados | >= 26.0 < 26.4 | 26.4 |
| apple | iphone_os | < 18.7.7 | 18.7.7 |
| apple | iphone_os | >= 26.0 < 26.4 | 26.4 |
| apple | macos | < 26.4 | 26.4 |
| apple | safari | < 26.4 | 26.4 |
| apple | tvos | < 26.4 | 26.4 |
| apple | visionos | < 26.4 | 26.4 |
| apple | watchos | < 26.4 | 26.4 |
| debian | webkit2gtk | < webkit2gtk 2.52.1-1 (sid) | webkit2gtk 2.52.1-1 (sid) |
| debian | wpewebkit | < webkit2gtk 2.52.1-1 (sid) | webkit2gtk 2.52.1-1 (sid) |
| ubuntu | webkit2gtk | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
osv6.5MEDIUM
vendor_debian6.5MEDIUM
vendor_redhat6.5MEDIUM
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Ubuntu
WebKitGTK vulnerabilities
vendor_ubuntu·2026-05-06
CVE-2026-20644 WebKitGTK vulnerabilities
Title: WebKitGTK vulnerabilities
Summary: Several security issues were fixed in WebKitGTK.
Several security issues were discovered in the WebKitGTK Web and JavaScript
engines. If a user were tricked into viewing a malicious website, a remote
attacker could exploit a variety of issues related to web browser security,
including cross-site scripting attacks, denial of service attacks, and
arbitrary code execution.
Instructions: This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart any applications
that use WebKitGTK, such as Epiphany, to make all the necessary changes.
Red Hat
webkitgtk: Processing maliciously crafted web content may prevent Content Security Policy from being enforced
vendor_redhat·2026-03-28·CVSS 6.5
CVE-2026-20665 [MEDIUM] CWE-693 webkitgtk: Processing maliciously crafted web content may prevent Content Security Policy from being enforced
webkitgtk: Processing maliciously crafted web content may prevent Content Security Policy from being enforced
This issue was addressed through improved state management. This issue is fixed in Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4. Processing maliciously crafted web content may prevent Content Security Policy from being enforced.
A flaw was found in WebKitGTK. Processing malicious web content may prevent Content Security Policy from being enforced due to improper state management.
Statement: To exploit this flaw, an attacker needs to trick a user into processing or loading malicious web content. Due to this reason, this flaw has been rated with a moderate severity.
Mitigation: Do not process or load
Debian
CVE-2026-20665: webkit2gtk - This issue was addressed through improved state management. This issue is fixed ...
vendor_debian·2026·CVSS 6.5
CVE-2026-20665 [MEDIUM] CVE-2026-20665: webkit2gtk - This issue was addressed through improved state management. This issue is fixed ...
This issue was addressed through improved state management. This issue is fixed in Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4. Processing maliciously crafted web content may prevent Content Security Policy from being enforced.
Scope: local
bookworm: open
bullseye: open
forky: open
sid: resolved (fixed in 2.52.1-1)
trixie: open
GHSA
GHSA-w9qh-3c3h-mc7x: This issue was addressed through improved state management
ghsa_unreviewed·2026-03-25
CVE-2026-20665 [MEDIUM] CWE-693 GHSA-w9qh-3c3h-mc7x: This issue was addressed through improved state management
This issue was addressed through improved state management. This issue is fixed in Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4. Processing maliciously crafted web content may prevent Content Security Policy from being enforced.
OSV
CVE-2026-20665: This issue was addressed through improved state management
osv·2026-03-25·CVSS 6.5
CVE-2026-20665 [MEDIUM] CVE-2026-20665: This issue was addressed through improved state management
This issue was addressed through improved state management. This issue is fixed in Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4. Processing maliciously crafted web content may prevent Content Security Policy from being enforced.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-20665 webkitgtk: Processing maliciously crafted web content may prevent Content Security Policy from being enforced [fedora-all]
bugzilla·2026-03-30·CVSS 6.5
CVE-2026-20665 [MEDIUM] CVE-2026-20665 webkitgtk: Processing maliciously crafted web content may prevent Content Security Policy from being enforced [fedora-all]
CVE-2026-20665 webkitgtk: Processing maliciously crafted web content may prevent Content Security Policy from being enforced [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
FEDORA-2026-f00460a7d9 (webkitgtk-2.52.1-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-f00460a7d9
---
FEDORA-2026-431948187d (webkitgtk-2.52.1-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-431948187d
---
FEDORA-2026-36594550b0 (webkitgtk-2.52.1-1.fc42) has been submitted as an update to Fedora 42.
Bugzilla
CVE-2026-20665 webkitgtk: Processing maliciously crafted web content may prevent Content Security Policy from being enforced
bugzilla·2026-03-30·CVSS 6.5
CVE-2026-20665 [MEDIUM] CVE-2026-20665 webkitgtk: Processing maliciously crafted web content may prevent Content Security Policy from being enforced
CVE-2026-20665 webkitgtk: Processing maliciously crafted web content may prevent Content Security Policy from being enforced
This issue was addressed through improved state management. This issue is fixed in Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4. Processing maliciously crafted web content may prevent Content Security Policy from being enforced.
Discussion:
This issue has been addressed in the following products:
Red Hat Enterprise Linux 9
Via RHSA-2026:9692 https://access.redhat.com/errata/RHSA-2026:9692
Wiz
CVE-2026-20665 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 6.5
CVE-2026-20665 [MEDIUM] CVE-2026-20665 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-20665 :
Apple Safari vulnerability analysis and mitigation
This issue was addressed through improved state management. This issue is fixed in Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4. Processing maliciously crafted web content may prevent Content Security Policy from being enforced.
Source : NVD
## 6.5
Score
Published March 25, 2026
Severity MEDIUM
CNA Score 6.5
Affected Technologies
Apple Safari
macOS
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 36.5
Exploitation Probability (EPSS) 0.2
Affected packages and libraries
WebKit
libwebkit2gtk
Sources
Debian 11, 12, 13 Severity MEDIUM
2026-03-25
Published