CVE-2026-84576

Sensitive User Data Exposure via Missing Validation Checks

Published Sep 14, 2026 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Description
This issue was addressed with improved checks. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to access sensitive user data.

Analysis

AI-generated

Technical impact

The vulnerability arises from missing validation checks that enable an application to read sensitive user data, such as personal information, credentials, or configuration settings, without explicit permission. This flaw represents an information disclosure weakness, allowing an unauthorized party to access confidential data that should be protected by the operating system's privacy controls.

Affected Systems

Apple macOS systems whose versions are older than the releases that contain the fix—specifically prior to macOS Golden Gate 27, prior to macOS Sequoia 15.8, and prior to macOS Tahoe 26.7—remain susceptible. All releases before these point releases are considered vulnerable.

Risk and Exploitability

The CVSS base score of 5.5 indicates moderate severity, while the EPSS figure of less than 1% suggests a very low probability of exploitation at present. The vulnerability is not listed in the CISA KEV catalog, reducing urgency for immediate action beyond patching. Attackers would need to execute a malicious application locally on the affected can be leveraged by an installed app, implying a local code execution scenario.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Upgrade macOS to the latest release that includes the fix: Golden Gate 27, Sequoia 15.8, or Tahoe 26.7.
  • Revise application permissions for sensitive data by removing unnecessary access through System Settings → Privacy.
  • Inspect system logs and employ network monitoring to detect abnormal data read or exfiltration activity.

Generated by OpenCVE AI on September 21, 2026 at 00:01 UTC.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title Sensitive User Data Exposure via Missing Validation Checks
Type Values Removed Values Added
Title macOS App Access to Sensitive User Data Due to Missing Validation
Weaknesses CWE-285
Type Values Removed Values Added
CPEs cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title macOS App Access to Sensitive User Data Due to Missing Validation
Weaknesses CWE-200
CWE-285
Type Values Removed Values Added
First Time appeared Apple
Apple macos
Vendors & Products Apple
Apple macos
Type Values Removed Values Added
Description This issue was addressed with improved checks. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to access sensitive user data.
References
Weaknesses
  • CWE-200

    Exposure of Sensitive Information to an Unauthorized Actor

Sources

Status
PUBLISHED
Assigner
apple
Published
Updated
Oct 26, 2026, 8:33 PM
Reserved
Sep 1, 2026, 9:13 PM
Status
Analyzed
Published
Sep 14, 2026, 9:17 PM
Modified
Sep 16, 2026, 5:09 PM