EUVD-2026-77903
GHSA-hrf7-5rq7-gq9x
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
Local crafted-file parse with required user interaction; description supports only app termination, so C:N/I:N and A:H, not the vendor's C:H.
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
6DescriptionNVD
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Processing a maliciously crafted disk image may lead to unexpected app termination.
AnalysisAI
Processing a maliciously crafted disk image on an unpatched Apple macOS system can trigger an out-of-bounds read that terminates the affected application unexpectedly. The issue affects macOS releases before Golden Gate 27, Sequoia 15.8, and Tahoe 26.7, and requires a local user with no privileges (PR:N) to open or mount the crafted image, meaning user interaction (UI:R) is the trigger rather than remote network access. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to locally process (open or mount) a maliciously crafted disk image on an unpatched macOS system (before Golden Gate 27, Sequoia 15.8, or Tahoe 26.7). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a classic high-CVSS-but-modest-real-risk issue. … 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 by upgrading to macOS Golden Gate 27, macOS Sequoia 15.8, or macOS Tahoe 26.7 depending on the supported release train; Apple's advisories at https://support.apple.com/en-us/149035, https://support.apple.com/en-us/149042, and https://support.apple.com/en-us/149043 list the fixed builds. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all macOS endpoints and identify those running versions prior to Golden Gate 27, Sequoia 15.8, and Tahoe 26.7. …
Sign in for detailed remediation steps and compensating controls.
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External POC / Exploit Code
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