{"id":"CVE-2026-87952","kind":"vulnerability","aliases":["CVE-2026-87952"],"related":[],"title":"Drupal SAML SSO Service Provider: capture-replay lets stolen logins authenticate","description":"Authentication Bypass by Capture-replay vulnerability in Drupal SAML SSO - Service Provider  allows Remote Services with Stolen Credentials. This issue affects SAML SSO - Service Provider  versions: from 0.0.0 to 3.2.0.","summary":"The Drupal SAML SSO - Service Provider module has a capture-replay authentication bypass affecting versions up to and including 3.2.0. An attacker who has captured valid SAML authentication messages can replay them to log in to remote services.","severity":"low","cvss":3.1,"epss":0.00219,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["drupal","package","saml","sso"],"not_affected_if":["no-saml-sso-module"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-10-22T02:17:04+00:00","first_seen_at":"2026-10-23T21:57:30+00:00","triaged_at":"2026-10-25T04:47:23+00:00","updated_at":"2026-10-25T04:47:23+00:00","category":"package","confidence":0.5,"triage":{"at":"2026-10-25T04:47:23Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"Drupal SAML SSO Service Provider: capture-replay lets stolen logins authenticate","impact":"medium","summary":"The Drupal SAML SSO - Service Provider module has a capture-replay authentication bypass affecting versions up to and including 3.2.0. An attacker who has captured valid SAML authentication messages can replay them to log in to remote services.","category":"package","nicknames":[],"who_cares":["drupal","saml","sso"],"confidence":0.5,"needs_auth":"yes","worst_case":"attacker replays captured SAML login to access accounts","analyst_note":"Sources give only the affected range (0.0.0 to 3.2.0); check the Drupal security advisory for the fixed version and how replay is performed.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["no-saml-sso-module"],"who_is_affected":"Sites running the Drupal SAML SSO - Service Provider module at version 3.2.0 or earlier that use it for single sign-on. Sites without this module, or not using SAML single sign-on, are not affected.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"low"},"cost_usd":0.000548,"input_tokens":3356,"output_tokens":424,"severity_before":"low"},"analyst_status":null,"analyst_note":null,"search":"'-2026':14A,17A '-87952':15A,18A '0.0.0':90C '3.2.0':43B,92C 'affect':37B,83C 'allow':75C 'attack':45B 'authent':12A,35B,51B,62C 'bypass':36B,63C 'captur':7A,33B,48B,66C 'capture-replay':6A,32B,65C 'credenti':80C 'cve':13A,16A 'drupal':1A,19B,24B,70C 'includ':42B 'issu':82C 'let':9A 'log':57B 'login':11A 'messag':52B 'modul':29B 'packag':20B 'provid':5A,28B,74C,87C 'remot':60B,76C 'replay':8A,34B,54B,67C 'saml':2A,21B,25B,50B,71C,84C 'servic':4A,27B,61B,73C,77C,86C 'sso':3A,22B,26B,72C,85C 'stolen':10A,79C 'valid':49B 'version':38B,88C 'vulner':68C","nicknames":[],"mitigations":[],"who_affected":"Sites running the Drupal SAML SSO - Service Provider module at version 3.2.0 or earlier that use it for single sign-on. Sites without this module, or not using SAML single sign-on, are not affected.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-22T02:17:04+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","cvss_by":"134c704f-9b21-4f2e-91b3-4a467353bcc0","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-87952","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-87952","severity":null,"published_at":"2026-10-22T02:17:04+00:00","modified_at":"2026-10-22T16:54:17+00:00","first_seen_at":"2026-10-23T21:57:30+00:00","fetched_at":"2026-10-23T22:29:02+00:00","note":null},{"source":"epss","external_id":"CVE-2026-87952","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-87952","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-24T07:15:52+00:00","fetched_at":"2026-10-24T07:15:52+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}