CVE-2026-28891

Race Condition Enables Sandbox Escape in macOS

Published Mar 25, 2026 CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed
Description
A race condition was addressed with additional validation. This issue is fixed in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4. An app may be able to break out of its sandbox.

Analysis

AI-generated

Technical impact

The vulnerability is a race condition in macOS that can allow a sandboxed application to escape its sandbox and access protected resources. It results from a timing-related flaw that was corrected by adding additional validation logic in the operating system.

Affected Systems

Apple macOS versions before 15.7.5 (Sequoia), 14.8.5 (Sonoma), and 26.4 (Tahoe) are affected. Devices running earlier releases of these macOS lines can run a sandboxed application that may exploit the race condition.

Risk and Exploitability

The CVSS score of 8.1 indicates high severity. An EPSS score of less than 1 % suggests a low likelihood of widespread exploitation, and the vulnerability is not listed in the CISA KEV catalog. Based on the description, the likely attack path requires inducing a race condition within a sandboxed application, which may involve manipulating the timing of operations; this is inferred from the nature of a race condition but is not directly confirmed by the provided data. Because of the need for precise timing, exploitation is considered to have moderate difficulty.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Install macOS updates to version 15.7.5, 14.8.5, or 26.4 or later, which fix the race condition.
  • Verify the update installation by checking the system’s Software Update pane or running softwareupdate --history.
  • If the update cannot be applied immediately, limit the use of affected sandboxed applications until the patch is installed to reduce the chance of exploitation.

Generated by OpenCVE AI on March 25, 2026 at 20:24 UTC.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title Race Condition Enables Sandbox Escape in macOS
Type Values Removed Values Added
CPEs cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Weaknesses CWE-362
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H'}

ssvc

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

Type Values Removed Values Added
First Time appeared Apple
Apple macos
Vendors & Products Apple
Apple macos
Type Values Removed Values Added
Description A race condition was addressed with additional validation. This issue is fixed in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4. An app may be able to break out of its sandbox.
References
Weaknesses
  • CWE-362

    Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Sources

Status
PUBLISHED
Assigner
apple
Published
Updated
Apr 2, 2026, 6:25 PM
Reserved
Mar 3, 2026, 4:36 PM
Status
Analyzed
Published
Mar 25, 2026, 1:17 AM
Modified
Jun 17, 2026, 10:29 AM