CVE-2026-65391

Undergoing Analysis Undergoing Analysis - In Progress

Out-of-Bounds Write in Safari and Apple OS Versions

Publication date: 2026-09-14

Last updated on: 2026-09-16

Assigner: Apple Inc.

Description

An out-of-bounds write issue was addressed with improved bounds checking. 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:
Percentile:

Meta Information

Published

2026-09-14

Last Modified

2026-09-16

Generated

2026-10-05

AI Q&A

2026-09-15

EPSS Evaluated

2026-10-03

NVD

CVE-2026-65391

Affected Vendors & Products

Vendor	Product	Version / Range
apple	safari	26.6.1
apple	ios	26.6.1
apple	ipados	26.6.1
apple	macos_tahoe	26.6.2
apple	tvos	27
apple	visionos	27
apple	watchos	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 is an out-of-bounds write vulnerability caused by insufficient bounds checking in affected software. When processing specially crafted web content, it may corrupt memory, potentially allowing arbitrary code execution or crashes.

Detection Guidance

This vulnerability is specific to Apple software and requires checking installed versions of Safari, iOS, iPadOS, macOS Tahoe, tvOS, visionOS, or watchOS. No direct detection commands are provided in the CVE details. Users should verify if their systems are running outdated versions listed as vulnerable.

Impact Analysis

If exploited, this flaw could let attackers run malicious code on your device by tricking you into visiting a harmful website. It may cause crashes, data loss, or unauthorized access to your system.

Compliance Impact

The provided CVE data does not specify direct impacts on compliance with standards like GDPR or HIPAA. The vulnerability involves memory corruption from maliciously crafted web content, which could potentially lead to unauthorized data access or processing. However, no explicit compliance implications are mentioned in the given context.

Mitigation Strategies

Update affected Apple products to the fixed versions: Safari 26.6.1, iOS 26.6.1, iPadOS 26.6.1, macOS Tahoe 26.6.2, tvOS 27, visionOS 27, or watchOS 27. Enable automatic updates if available to prevent future vulnerabilities.

Hi! I’m here to help you understand CVE-2026-65391. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70