EUVD-2026-77860
GHSA-r34p-vc8p-9rhp
Severity by source
AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Attacker runs as a sandboxed app (AV:L, PR:L); escaping the sandbox crosses a security authority (S:C) yielding high confidentiality and integrity but no availability impact.
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
6DescriptionNVD
This issue was addressed with improved handling of symlinks. This issue is fixed in macOS Golden Gate 27. An app may be able to break out of its sandbox.
AnalysisAI
Sandbox escape in Apple macOS (all releases prior to Golden Gate 27) allows an app already running inside the macOS App Sandbox to break out of its confinement by abusing improper symlink handling, fixed by Apple in macOS Golden Gate 27. The attacker must first get a malicious or compromised sandboxed app installed and running on the target (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N, CWE-59), so there is no remote or network vector and no user interaction is required beyond launching the app. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to already be executing code as an application running inside the macOS App Sandbox on a system prior to macOS Golden Gate 27; the app then abuses improper symlink handling to escape confinement. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a locally-exploitable macOS sandbox-escape (CWE-59 symlink handling) with a vendor CVSS of 8.4 via CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N. … 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 | Vendor-released patch: macOS Golden Gate 27 (macOS 27), available through System Settings > General > Software Update or Apple's standalone installers; Apple's advisory at https://support.apple.com/en-us/149035 documents the corrected symlink handling, and upgrading is the only complete fix because the flaw lives in a system sandbox component rather than an app that can be individually replaced. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all macOS endpoints to identify systems running versions prior to Golden Gate 27, restrict software installation to trusted sources via Gatekeeper and MDM policies, and alert security operations to monitor for anomalous sandboxed application behavior. …
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External POC / Exploit Code
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