---
id: CVE-2026-20665
title: This issue was addressed through improved state management
summary: >-
  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 craf…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L'
cvssSource: adp
vendor: Apple
product: Safari
affected:
  - Safari < 26.4
  - ios_and_ipados < 18.7.7
  - ios_and_ipados < 26.4
  - macOS < 26.4
  - tvOS < 26.4
  - visionOS < 26.4
  - watchOS < 26.4
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-03-25T19:30:29.669623Z'
published: '2026-03-25'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T20:42:41.401Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-20665'
references:
  - url: 'https://support.apple.com/en-us/126792'
  - url: 'https://support.apple.com/en-us/126793'
  - url: 'https://support.apple.com/en-us/126794'
  - url: 'https://support.apple.com/en-us/126797'
  - url: 'https://support.apple.com/en-us/126798'
  - url: 'https://support.apple.com/en-us/126799'
  - url: 'https://support.apple.com/en-us/126800'
tags:
  - cve.org
epss: 0.00634
epssPercentile: 0.50182
ingestedAt: '2026-10-27T16:11:59.069Z'
---

## Overview

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

- `Safari < 26.4`
- `ios_and_ipados < 18.7.7`
- `ios_and_ipados < 26.4`
- `macOS < 26.4`
- `tvOS < 26.4`
- `visionOS < 26.4`
- `watchOS < 26.4`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.