{"id":"CVE-2026-87945","kind":"vulnerability","aliases":["CVE-2026-87945"],"related":[],"title":"Drupal SAML SSO Service Provider: open redirect enables fake data source","description":"URL Redirection to Untrusted Site ('Open Redirect') vulnerability in Drupal SAML SSO - Service Provider  allows Fake the Source of Data. This issue affects SAML SSO - Service Provider  versions: from 0.0.0 to 3.2.0.","summary":"The Drupal SAML SSO - Service Provider module redirects users to URLs an attacker can choose, so a crafted link can send a visitor to a malicious site. The advisory describes it as letting an attacker fake the source of data.","severity":"medium","cvss":5.4,"epss":0.00172,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["drupal","package","saml","self-hosted","sso"],"not_affected_if":["module-not-installed"],"how_to_check":"- Check the installed version of the Drupal SAML SSO - Service Provider module with `drush pm:list --filter=saml` or the module list at /admin/modules.\n- Treat any version up to and including `3.2.0` as affected, per the description.","fix":"- Upgrade the SAML SSO - Service Provider module to a version newer than `3.2.0`. The fixed version is unknown from the sources.","status":"open","published_at":"2026-10-22T02:17:04+00:00","first_seen_at":"2026-10-23T21:57:30+00:00","triaged_at":"2026-10-25T04:14:29+00:00","updated_at":"2026-10-25T04:14:29+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-25T04:14:29Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade the SAML SSO - Service Provider module to a version newer than `3.2.0`. The fixed version is unknown from the sources.","reach":"internet","title":"Drupal SAML SSO Service Provider: open redirect enables fake data source","impact":"medium","summary":"The Drupal SAML SSO - Service Provider module redirects users to URLs an attacker can choose, so a crafted link can send a visitor to a malicious site. The advisory describes it as letting an attacker fake the source of data.","category":"package","nicknames":[],"who_cares":["drupal","saml","sso","self-hosted"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Users are redirected to attacker-chosen sites after login, enabling phishing and fake data.","analyst_note":"","how_to_check":"- Check the installed version of the Drupal SAML SSO - Service Provider module with `drush pm:list --filter=saml` or the module list at /admin/modules.\n- Treat any version up to and including `3.2.0` as affected, per the description.","needs_analyst":false,"not_affected_if":["module-not-installed"],"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 are not affected.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000586,"input_tokens":3366,"output_tokens":498,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':13A,16A '-87945':14A,17A '0.0.0':94C '3.2.0':96C 'advisori':53B 'affect':87C 'allow':79C 'attack':37B,59B 'choos':39B 'craft':42B 'cve':12A,15A 'data':10A,64B,84C 'describ':54B 'drupal':1A,18B,26B,74C 'enabl':8A 'fake':9A,60B,80C 'host':23B 'issu':86C 'let':57B 'link':43B 'malici':50B 'modul':31B 'open':6A,70C 'packag':19B 'provid':5A,30B,78C,91C 'redirect':7A,32B,66C,71C 'saml':2A,20B,27B,75C,88C 'self':22B 'self-host':21B 'send':45B 'servic':4A,29B,77C,90C 'site':51B,69C 'sourc':11A,62B,82C 'sso':3A,24B,28B,76C,89C 'untrust':68C 'url':35B,65C 'user':33B 'version':92C 'visitor':47B 'vulner':72C","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 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:L/PR:N/UI:R/S:U/C:L/I:L/A:N","cvss_by":"134c704f-9b21-4f2e-91b3-4a467353bcc0","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-87945","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-87945","severity":null,"published_at":"2026-10-22T02:17:04+00:00","modified_at":"2026-10-22T17:17:00+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-2026-87945","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-87945","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"}