{"id":"CVE-2026-89209","aliases":["EUVD-2026-109739","GHSA-c6gm-hvjc-mr8p"],"status":"published","title":"A vulnerability has been identified in Mendix SAML (Mendix 10 compatible) (All versions \u003c V4.2.4)...","description":"A vulnerability has been identified in Mendix SAML (Mendix 10 compatible) (All versions \u003c V4.2.4), Mendix SAML (Mendix 11 compatible) (All versions \u003c V4.2.4), Mendix SAML (Mendix 9 compatible) (All versions \u003c V3.6.29). Affected versions of the module do not properly protect against SAML assertion replay in IdP-initiated authentication flows. This could allow unauthenticated remote attackers to gain unauthorized access to the application by replaying a valid SAML response.","severity":{"version":"4.0","score":7.6,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00259,"percentile":0.17726,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-294"],"published":"2026-10-26T10:41:01Z","modified":"2026-10-31T02:17:34Z","products":[{"vendor":"siemens","product":"mendix saml (mendix 10 compatible)"},{"vendor":"siemens","product":"mendix saml (mendix 11 compatible)"},{"vendor":"siemens","product":"mendix saml (mendix 9 compatible)"}],"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-137528.html"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89209"},{"url":"https://github.com/advisories/GHSA-c6gm-hvjc-mr8p"}],"sources":{"cve":[{"id":"CVE-2026-89209","description":"A vulnerability has been identified in Mendix SAML (Mendix 10 compatible) (All versions \u003c V4.2.4), Mendix SAML (Mendix 11 compatible) (All versions \u003c V4.2.4), Mendix SAML (Mendix 9 compatible) (All versions \u003c V3.6.29). Affected versions of the module do not properly protect against SAML assertion replay in IdP-initiated authentication flows. This could allow unauthenticated remote attackers to gain unauthorized access to the application by replaying a valid SAML response.","status":"published","published":"2026-10-26T10:41:01.088Z","modified":"2026-10-31T01:13:36.246Z","cvss":[{"version":"4.0","score":7.6,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-294"],"updated_at":"2026-11-02T14:19:55.526923Z"}],"euvd":[{"id":"EUVD-2026-109739","description":"A vulnerability has been identified in Mendix SAML (Mendix 10 compatible) (All versions \u003c V4.2.4), Mendix SAML (Mendix 11 compatible) (All versions \u003c V4.2.4), Mendix SAML (Mendix 9 compatible) (All versions \u003c V3.6.29). Affected versions of the module do not properly protect against SAML assertion replay in IdP-initiated authentication flows. This could allow unauthenticated remote attackers to gain unauthorized access to the application by replaying a valid SAML response.","status":"published","published":"2026-10-26T10:41:01Z","modified":"2026-10-31T01:13:36Z","cvss":[{"version":"4.0","score":7.6,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:59:01.632804Z"}],"ghsa":[{"id":"GHSA-c6gm-hvjc-mr8p","title":"A vulnerability has been identified in Mendix SAML (Mendix 10 compatible) (All versions \u003c V4.2.4)...","description":"A vulnerability has been identified in Mendix SAML (Mendix 10 compatible) (All versions \u003c V4.2.4), Mendix SAML (Mendix 11 compatible) (All versions \u003c V4.2.4), Mendix SAML (Mendix 9 compatible) (All versions \u003c V3.6.29). Affected versions of the module do not properly protect against SAML assertion replay in IdP-initiated authentication flows. This could allow unauthenticated remote attackers to gain unauthorized access to the application by replaying a valid SAML response.","status":"published","published":"2026-10-26T12:32:31Z","modified":"2026-10-26T12:32:38Z","cvss":[{"version":"4.0","score":7.6,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/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","level":"high"},{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"medium"}],"cwes":["CWE-294"],"updated_at":"2026-11-02T15:14:23.996006Z"}],"nvd":[{"id":"CVE-2026-89209","description":"A vulnerability has been identified in Mendix SAML (Mendix 10 compatible) (All versions \u003c V4.2.4), Mendix SAML (Mendix 11 compatible) (All versions \u003c V4.2.4), Mendix SAML (Mendix 9 compatible) (All versions \u003c V3.6.29). Affected versions of the module do not properly protect against SAML assertion replay in IdP-initiated authentication flows. This could allow unauthenticated remote attackers to gain unauthorized access to the application by replaying a valid SAML response.","status":"published","published":"2026-10-26T11:16:38.583Z","modified":"2026-10-31T02:17:34.337Z","cvss":[{"version":"4.0","score":7.6,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/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","level":"high","assessor":"secondary"},{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-294"],"updated_at":"2026-11-02T14:13:03.452847Z"}]}}