CVE-2026-43791

macOS Arbitrary File Read via Input Validation Flaw

Published Sep 14, 2026 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Description
A validation issue was addressed with improved input sanitization. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to read arbitrary files.

Analysis

AI-generated

Technical impact

An input validation flaw in macOS allows applications to read arbitrary files by bypassing file access controls. This can let an attacker obtain sensitive data such as configuration files, credentials, or other private information, leading to confidentiality compromise.

Affected Systems

The vulnerability affects Apple macOS in releases that are still using the unpatched input handling, including macOS Golden Gate prior to version 27, macOS Sequoia prior to 15.8, and macOS Tahoe prior to 26.7.

Risk and Exploitability

The CVSS score of 6.5 indicates the vulnerability severity, while the EPSS score of less than 1% shows a very low likelihood of exploitation. The flaw is not listed in the CISA KEV catalog, implying no known public exploits. Attackers would need to supply crafted input to an affected application or compromise a local user session, so the threat is primarily local or privilege‑local. While the risk of widespread exploitation is low, the potential for data exposure makes timely remediation important.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Upgrade macOS to at least Golden Gate 27, Sequoia 15.8, or Tahoe 26.7 to apply the fixed input sanitization.
  • Configure application sandboxing or file‑system permissions so the affected applications can access only the directories and files required for normal operation.
  • If an update is not immediately possible, employ network or endpoint controls to prevent installation or execution of untrusted applications that could trigger the vulnerability.

Generated by OpenCVE AI on September 20, 2026 at 20:23 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Title macOS Arbitrary File Read via Input Validation Flaw
Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
Weaknesses CWE-22
CPEs cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}

Type Values Removed Values Added
Title Arbitrary File Read via Input Validation Flaw in macOS
Weaknesses CWE-20
CWE-200
CWE-22
Type Values Removed Values Added
Title Arbitrary File Read via Input Validation Flaw in macOS
Weaknesses CWE-20
CWE-200
CWE-22
Type Values Removed Values Added
First Time appeared Apple
Apple macos
Vendors & Products Apple
Apple macos
Type Values Removed Values Added
Description A validation issue was addressed with improved input sanitization. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to read arbitrary files.
References
Weaknesses
  • CWE-22

    Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Sources

Status
PUBLISHED
Assigner
apple
Published
Updated
Oct 26, 2026, 8:36 PM
Reserved
May 1, 2026, 10:46 PM
Status
Modified
Published
Sep 14, 2026, 9:17 PM
Modified
Sep 17, 2026, 3:16 PM