CVE-2026-43677

Analyzed Analyzed - Analysis Complete

Out-of-Bounds Write in macOS Golden Gate

Publication date: 2026-09-14

Last updated on: 2026-09-15

Assigner: Apple Inc.

Description

An out-of-bounds write issue was addressed by removing the vulnerable code. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Connecting to a malicious WebDAV server may lead to unexpected app termination.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-14

Last Modified

2026-09-15

Generated

2026-10-05

AI Q&A

2026-09-15

EPSS Evaluated

2026-10-04

NVD

CVE-2026-43677

Affected Vendors & Products

Vendor	Product	Version / Range
apple	macos	From 15.0 (inc) to 15.8 (exc)
apple	macos	From 26.0 (inc) to 26.7 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-787	The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This is an out-of-bounds write vulnerability that was fixed by removing the vulnerable code. It affected macOS versions before Golden Gate 27, Sequoia 15.8, and Tahoe 26.7. The issue could be triggered by connecting to a malicious WebDAV server, potentially causing unexpected app termination.

Detection Guidance

This vulnerability is addressed by updating to specific macOS versions. Detection involves checking your macOS version against the fixed releases: macOS Golden Gate 27, macOS Sequoia 15.8, or macOS Tahoe 26.7. Use the command 'sw_vers' in Terminal to check your current version.

Impact Analysis

If exploited, this vulnerability could lead to unexpected app termination when connecting to a malicious WebDAV server. It does not appear to allow arbitrary code execution or data theft based on the provided description.

Compliance Impact

The provided CVE data does not specify any direct impact on compliance with standards like GDPR or HIPAA. The vulnerability involves an out-of-bounds write issue in macOS that could lead to app termination when connecting to a malicious WebDAV server. Without explicit details on data exposure or privacy implications, its compliance impact remains unclear.

Mitigation Strategies

Update to macOS Golden Gate 27, macOS Sequoia 15.8, or macOS Tahoe 26.7 to address the out-of-bounds write issue. Avoid connecting to untrusted WebDAV servers until the update is applied.

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