{"id":"CVE-2018-7340","aliases":["EUVD-2018-19072","GHSA-39gm-mmxq-4x9r"],"status":"published","title":"Multiple SAML libraries may allow authentication bypass via incorrect XML canonicalization and DOM traversal","description":"Duo Network Gateway 1.2.9 and earlier may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attack to potentially bypass authentication to SAML service providers.","severity":{"version":"3.0","score":7.7,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-07","score":0.00942,"percentile":0.61206,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287","CWE-347"],"published":"2019-04-17T14:01:03Z","modified":"2026-06-17T02:03:03Z","products":[{"vendor":"cisco","product":"duo_network_gateway"},{"vendor":"duo security","product":"duo network gateway"}],"references":[{"url":"https://duo.com/blog/duo-finds-saml-vulnerabilities-affecting-multiple-implementations","tags":["x_refsource_MISC","x_transferred","Exploit","Vendor Advisory"]},{"url":"https://www.kb.cert.org/vuls/id/475445","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-7340"},{"url":"https://github.com/advisories/GHSA-39gm-mmxq-4x9r"}],"sources":{"cve":[{"id":"CVE-2018-7340","title":"Multiple SAML libraries may allow authentication bypass via incorrect XML canonicalization and DOM traversal","description":"Duo Network Gateway 1.2.9 and earlier may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attack to potentially bypass authentication to SAML service providers.","status":"published","published":"2019-04-17T14:01:03Z","modified":"2024-08-05T06:24:11.848Z","cvss":[{"version":"3.0","score":7.7,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:35:10.313768Z"}],"euvd":[{"id":"EUVD-2018-19072","description":"Duo Network Gateway 1.2.9 and earlier may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attack to potentially bypass authentication to SAML service providers.","status":"published","published":"2019-04-17T14:01:03Z","modified":"2024-08-05T06:24:11Z","cvss":[{"version":"3.0","score":7.7,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-03T02:40:06.159235Z"}],"ghsa":[{"id":"GHSA-39gm-mmxq-4x9r","title":"Duo Network Gateway 1.2.9 and earlier may incorrectly utilize the results of XML DOM traversal...","description":"Duo Network Gateway 1.2.9 and earlier may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attack to potentially bypass authentication to SAML service providers.","status":"published","published":"2022-05-13T01:15:03Z","modified":"2023-02-01T05:04:31Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:50:09.90532Z"}],"nvd":[{"id":"CVE-2018-7340","description":"Duo Network Gateway 1.2.9 and earlier may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attack to potentially bypass authentication to SAML service providers.","status":"published","published":"2019-04-17T15:29:00.64Z","modified":"2026-06-17T02:03:03.433Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary"},{"version":"3.0","score":7.7,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"high","assessor":"secondary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-287","CWE-347"],"updated_at":"2026-11-02T14:04:55.136632Z"}]}}