Universal XSS in Apple Safari and iOS via Malicious Webarchive File

Publication date: 2026-09-14

Last updated on: 2026-09-14

Assigner: Apple Inc.

Description

A logic issue was addressed with improved state management. This issue is fixed in Safari 27, iOS 27 and iPadOS 27, macOS Golden Gate 27, visionOS 27. Opening a maliciously crafted webarchive file may lead to universal cross-site scripting.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-14

Last Modified

2026-09-14

Generated

2026-09-15

AI Q&A

2026-09-15

EPSS Evaluated

N/A

NVD

CVE-2026-86898

Affected Vendors & Products

Vendor	Product	Version / Range
apple	safari	27
apple	ios	27
apple	ipados	27
apple	macos_golden_gate	27
apple	visionos	27

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability is a logic issue in Apple's software that allows universal cross-site scripting when a maliciously crafted webarchive file is opened. It was fixed in Safari 27, iOS 27, iPadOS 27, macOS Golden Gate 27, and visionOS 27.

Impact Analysis

Opening a malicious webarchive file could allow an attacker to execute malicious scripts in your browser, potentially stealing data, session cookies, or performing actions on your behalf without your knowledge.

Mitigation Strategies

Update affected Apple products to the latest versions: Safari 27, iOS 27, iPadOS 27, macOS Golden Gate 27, or visionOS 27. Avoid opening untrusted webarchive files until the update is applied.

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