CVE-2026-65390

Undergoing Analysis Undergoing Analysis - In Progress

Integer Overflow in Safari Leading to Memory Corruption

Publication date: 2026-09-14

Last updated on: 2026-09-16

Assigner: Apple Inc.

Description

An integer overflow was addressed with improved input validation. This issue is fixed in Safari 26.6.1, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2, tvOS 27, visionOS 27, watchOS 27. Processing maliciously crafted web content may lead to memory corruption.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-14

Last Modified

2026-09-16

Generated

2026-10-05

AI Q&A

2026-09-15

EPSS Evaluated

2026-10-04

NVD

CVE-2026-65390

Affected Vendors & Products

Vendor	Product	Version / Range
apple	safari	26.6.1
apple	ios	26.6.1
apple	ipad_os	26.6.1
apple	macos_tahoe	26.6.2
apple	tv_os	27
apple	vision_os	27
apple	watch_os	27

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-190	The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Attack-Flow Graph

Executive Summary

This vulnerability is an integer overflow caused by insufficient input validation. It occurs when Safari or other Apple software processes specially crafted web content, potentially leading to memory corruption. The issue was fixed in recent updates to Safari, iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS.

Detection Guidance

This vulnerability is specific to Apple software versions before Safari 26.6.1, iOS 26.6.1, iPadOS 26.6.1, macOS Tahoe 26.6.2, tvOS 27, visionOS 27, and watchOS 27. Check your software versions against these updates to detect exposure.

Impact Analysis

If exploited, this vulnerability could allow attackers to execute arbitrary code or crash applications by corrupting memory. Users could experience crashes, data loss, or unauthorized access to their devices if they visit a malicious website or open a crafted file.

Compliance Impact

The provided CVE data does not specify direct impacts on compliance with standards like GDPR or HIPAA. The vulnerability involves memory corruption due to an integer overflow, which could potentially lead to arbitrary code execution or denial of service. However, without explicit details on data exposure or processing, its direct effect on regulatory compliance cannot be determined from this context.

Mitigation Strategies

Update affected Apple software to the latest patched versions immediately. Disable automatic loading of web content if possible until updates are applied.

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