---
id: "CVE-2026-64789"
kind: "vulnerability"
aliases: ["CVE-2026-64789"]
title: "macOS: improved file attribute validation stops apps bypassing Gatekeeper checks"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["developers", "endpoints", "infrastructure", "macos"]
not_affected_if: ["already-patched"]
published_at: "2026-10-26T21:18:36+00:00"
first_seen_at: "2026-10-26T21:20:32+00:00"
updated_at: "2026-10-26T21:21:30+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64789", "first_seen_at": "2026-10-26T21:20:32+00:00"}]
---

# macOS: improved file attribute validation stops apps bypassing Gatekeeper checks

Apple fixed a flaw in macOS file attribute validation that let a malicious application bypass Gatekeeper checks. Gatekeeper is the macOS control that vets downloaded and unsigned software before it runs.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Run `sw_vers -productVersion` and compare against the fixed versions below.
- unknown

## Fix

- Update macOS to `27` (macOS Golden Gate), `15.8.2` (macOS Sequoia) or `26.7.2` (macOS Tahoe) or later.

## Timeline

- 2026-10-26T21:20:32+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-64789

## From the sources

This issue was addressed with improved validation of file attributes. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. A malicious application may bypass Gatekeeper checks.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_