CVE-2026-28900

Undergoing Analysis Undergoing Analysis - In Progress

File Quarantine Bypass in macOS ZIP Archives

Publication date: 2026-07-27

Last updated on: 2026-07-29

Assigner: Apple Inc.

Description

A file quarantine bypass was addressed with additional checks. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8. A maliciously crafted ZIP archive may bypass Gatekeeper checks.

CVSS Scores

EPSS Scores

Probability:
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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-2026-28900

EUVD

EUVD-2026-49445

Affected Vendors & Products

Vendor	Product	Version / Range
apple	macos	From 14.0 (inc) to 14.8.8 (exc)
apple	macos	From 15.0 (inc) to 15.7.8 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-290	This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.
CWE-693	The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

Attack-Flow Graph

Executive Summary

This vulnerability involves a file quarantine bypass in macOS where a maliciously crafted ZIP archive could evade Gatekeeper checks. Gatekeeper is a macOS security feature that verifies apps before allowing them to run. The issue was fixed in macOS Sequoia 15.7.8 and macOS Sonoma 14.8.8 with additional checks to prevent such bypasses.

Detection Guidance

This vulnerability involves a bypass of Gatekeeper checks via a maliciously crafted ZIP archive. Detection may require manual inspection of downloaded ZIP files or monitoring Gatekeeper logs for unexpected bypass events. No specific commands are provided in the context.

Impact Analysis

This vulnerability could allow an attacker to bypass macOS security checks and execute malicious software on your system. If you unzip a specially crafted ZIP file, the contained malware might run without macOS blocking it, potentially leading to data theft, system compromise, or further malware installation.

Compliance Impact

This vulnerability allows a maliciously crafted ZIP archive to bypass Gatekeeper checks, which could enable unauthorized code execution on a system. This may lead to data breaches or unauthorized access to sensitive information, potentially violating compliance requirements under GDPR, HIPAA, or other regulations that mandate strict access controls and data protection measures.

Mitigation Strategies

Update to macOS Sequoia 15.7.8 or macOS Sonoma 14.8.8 or later to address the file quarantine bypass issue.

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