EUVD-2026-77921
GHSA-8xgx-55xx-ch2w
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Local vector and an already-present low-privileged app (AV:L/PR:L); bypassing Gatekeeper weakens code-origin enforcement with limited confidentiality/integrity impact and no availability effect.
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
6DescriptionNVD
This issue was addressed with improved checks. This issue is fixed in macOS Golden Gate 27. An app may bypass Gatekeeper checks.
AnalysisAI
A locally installed application on macOS versions prior to macOS Golden Gate 27 can bypass Gatekeeper code-origin and notarization checks, weakening the platform control that is supposed to stop untrusted apps from launching. The flaw is assessed at CVSS 4.4 (AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N), meaning it requires local presence and normal user privileges, and the resulting impact is limited to partial confidentiality and integrity loss rather than code execution or denial of service. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires local presence of a malicious app on the target macOS system running with normal user privileges (AV:L, PR:L, no user interaction needed to trigger the bypass itself); the app must be crafted to evade Gatekeeper's code-origin/notarization enforcement. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuinely low-priority issue despite the 'Authentication Bypass' tag. … 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, documented in Apple support article 149035 (https://support.apple.com/en-us/149035); upgrading to macOS Golden Gate 27 or later is the only complete fix and should be prioritized for hosts that routinely run untrusted or side-loaded applications. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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