EUVD-2026-77855
GHSA-72qj-8ccg-957v
Severity by source
AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
A locally-run malicious app (AV:L) needs no extra privileges (PR:N) and escapes the sandbox, a genuine scope change (S:C) granting broad C/I/A impact.
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
6DescriptionNVD
A validation issue existed in the entitlement verification. This issue was addressed with improved validation of the process entitlement. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. A malicious app may be able to break out of its sandbox.
AnalysisAI
Apple macOS contains a process-entitlement verification flaw (CVE-2026-65381) that lets a malicious application break out of the App Sandbox, escalating its reach beyond the container it is supposed to be confined to. Affected systems are macOS versions prior to Golden Gate 27, Sequoia 15.8, and Tahoe 26.7; exploitation requires the attacker to first get their app onto the host and have it launched locally, after which no further privileges or user interaction are needed (assessed vector AV:L/PR:N/UI:N/S:C). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a malicious application to be installed and executed locally on the macOS host; the app then bypasses process-entitlement validation to break out of the App Sandbox. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuinely serious flaw - a validation failure in macOS process-entitlement verification (CWE-862) that lets a malicious app break out of the App Sandbox, which is a real scope change (S:C) and warrants high C/I/A. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the vendor-released patches: upgrade to macOS Golden Gate 27, macOS Sequoia 15.8, or macOS Tahoe 26.7 (or later) as appropriate for your release train, using the Apple security updates referenced at https://support.apple.com/en-us/149035, https://support.apple.com/en-us/149042, and https://support.apple.com/en-us/149043. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, run an inventory query against device management tooling to identify every Mac running a version below Golden Gate 27, Sequoia 15.8, or Tahoe 26.7, flag unreachable or unmanaged devices for follow-up, and confirm that endpoint detection coverage is active on the macOS fleet; direct users to apply the vendor update immediately and, as a precaution, restrict unsanctioned application installation on affected hosts until they are patched. …
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Same weakness CWE-862 – Missing Authorization
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External POC / Exploit Code
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