CVE-2026-28821

/* * Conceptual PoC for Entitlement Verification Bypass * This snippet demonstrates the logic where a check might be bypassed. */ #include <stdio.h> #include <Security/Security.h> // Simulated function to check process entitlement bool check_process_entitlement(const char *entitlement) { // In the vulnerable version, this validation logic might be flawed // e.g., it fails to properly verify the signature or allows race conditions. printf("Checking entitlement: %s\n", entitlement); return false; // Validation fails but might be ignored } void exploit_simulation() { const char *target_entitlement = "com.apple.private.security.no-container"; // Vulnerability: The system proceeds despite failed validation if (!check_process_entitlement(target_entitlement)) { // Logic path that should be blocked but isn't printf("[+] Privilege Escalation: Bypassing entitlement check.\n"); // grant_elevated_privileges(); } else { printf("[-] Access denied.\n"); } } int main() { exploit_simulation(); return 0; }

{"cve": {"id": "CVE-2026-28821", "sourceIdentifier": "[email protected]", "published": "2026-03-25T01:17:07.280", "lastModified": "2026-03-26T14:16:09.323", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "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 Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4. An app may be able to gain elevated privileges."}, {"lang": "es", "value": "Existía un problema de validación en la verificación de derechos. Este problema se abordó con una validación mejorada del derecho del proceso. Este problema está solucionado en macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4. Una aplicación podría obtener privilegios elevados."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.4, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.5, "impactScore": 5.9}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-20"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "versionStartIncluding": "14.0", "versionEndExcluding": "14.8.5", "matchCriteriaId": "D66288AF-23BD-407A-81F5-F1DFBF84C622"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "versionStartIncluding": "15.0", "versionEndExcluding": "15.7.5", "matchCriteriaId": "DD21D2C9-BBEC-4E8E-B8D2-C92B7E6155E1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "versionStartIncluding": "26.0", "versionEndExcluding": "26.4", "matchCriteriaId": "6CF848CD-25D4-4371-BEF3-1ACCE47AD81F"}]}]}], "references": [{"url": "https://support.apple.com/en-us/126794", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/126795", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/126796", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}]}}