CVE-2026-43728

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Keychain State Modification in macOS Tahoe

Publication date: 2026-07-27

Last updated on: 2026-07-29

Assigner: Apple Inc.

Description

This issue was addressed through improved state management. This issue is fixed in macOS Tahoe 26.6. An attacker may be able to modify the state of the Keychain.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-27

Last Modified

2026-07-29

Generated

2026-08-17

AI Q&A

2026-07-28

EPSS Evaluated

2026-08-15

NVD

CVE-2026-43728

EUVD

EUVD-2026-49525

Affected Vendors & Products

Vendor	Product	Version / Range
apple	macos	From 26.0 (inc) to 26.6 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-362	The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Attack-Flow Graph

Executive Summary

This vulnerability involves an attacker potentially modifying the state of the Keychain in macOS Tahoe 26.6. It was addressed through improved state management to prevent unauthorized changes.

Detection Guidance

This vulnerability affects macOS Tahoe 26.6 and involves potential Keychain state modification. Detection may require checking system logs for unusual Keychain access or modifications. Use commands like 'log show --predicate "process == Keychain"' to review Keychain-related activities.

Impact Analysis

An attacker exploiting this could alter Keychain data, potentially exposing sensitive information like passwords or encryption keys stored in the Keychain.

Compliance Impact

The provided CVE data does not specify any direct impact on compliance with standards like GDPR or HIPAA. The vulnerability involves potential modification of the Keychain state in macOS Tahoe 26.6, which could affect data integrity but lacks explicit compliance implications in the given context.

Mitigation Strategies

Update to macOS Tahoe 26.6 or later to address the vulnerability through improved state management.

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