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Medium severity · published Mar 25, 2026
CVE-2026-20665
This issue was addressed through improved state management
6.5
CVSS
0.6%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
macOS · Apple
before 26.4 · source: vendor, NVD
IO
iOS · Apple
before 18.7.7; 26.0 before 26.4 · source: NVD
SA
Safari · Apple
before 26.4 · source: vendor, NVD
IA
iOS and iPadOS · Apple
before 18.7.7; before 26.4 · source: vendor
TV
tvOS · Apple
before 26.4 · source: vendor, NVD
VI
visionOS · Apple
before 26.4 · source: vendor, NVD
WA
watchOS · Apple
before 26.4 · source: vendor, NVD
Affected product
MA
macOS
Apple
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-20665
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-20665
Release Notes
https://support.apple.com/en-us/126792
Release Notes
https://support.apple.com/en-us/126793
Release Notes
https://support.apple.com/en-us/126794
Release Notes
https://support.apple.com/en-us/126797
Release Notes
https://support.apple.com/en-us/126798
Release Notes
https://support.apple.com/en-us/126799
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