---
id: CVE-2026-28871
title: A logic issue was addressed with improved checks
summary: >-
  A logic issue was addressed with improved checks. 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. Visiting a maliciously crafted website may lead to a cross-site
  scripting att…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N'
cvssSource: adp
vendor: Apple
product: Safari
affected:
  - Safari < 26.4
  - ios_and_ipados < 18.7.7
  - ios_and_ipados < 26.4
  - macOS < 26.4
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-03-27T19:47:46.868438Z'
published: '2026-03-25'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T20:33:37.399Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-28871'
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/126800'
tags:
  - cve.org
epss: 0.00287
epssPercentile: 0.2111
ingestedAt: '2026-10-26T20:39:42.572Z'
---

## Overview

A logic issue was addressed with improved checks. 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. Visiting a maliciously crafted website may lead to a cross-site scripting attack.

## Affected

- `Safari < 26.4`
- `ios_and_ipados < 18.7.7`
- `ios_and_ipados < 26.4`
- `macOS < 26.4`

## Remediation

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