{"id":"CVE-2020-26834","aliases":["EUVD-2020-19370","GHSA-xwh3-6m65-fmmj"],"status":"published","title":"SAP HANA Database, version - 2.0, does not correctly validate the username when performing SAML...","description":"SAP HANA Database, version - 2.0, does not correctly validate the username when performing SAML bearer token-based user authentication. It is possible to manipulate a valid existing SAML bearer token to authenticate as a user whose name is identical to the truncated username for whom the SAML bearer token was issued.","severity":{"version":"3.0","score":4.2,"vector":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00691,"percentile":0.53153,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287"],"published":"2020-12-09T16:30:45Z","modified":"2026-06-17T03:08:25Z","products":[{"vendor":"sap","product":"hana_database"},{"vendor":"sap se","product":"sap hana database"},{"vendor":"sap_se","product":"sap hana database"}],"references":[{"url":"https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=564757079","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://launchpad.support.sap.com/#/notes/2978768","tags":["x_refsource_MISC","x_transferred","Permissions Required"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-26834"},{"url":"https://github.com/advisories/GHSA-xwh3-6m65-fmmj"}],"sources":{"cve":[{"id":"CVE-2020-26834","description":"SAP HANA Database, version - 2.0, does not correctly validate the username when performing SAML bearer token-based user authentication. It is possible to manipulate a valid existing SAML bearer token to authenticate as a user whose name is identical to the truncated username for whom the SAML bearer token was issued.","status":"published","published":"2020-12-09T16:30:45Z","modified":"2024-08-04T16:03:22.211Z","cvss":[{"version":"3.0","score":4.2,"vector":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:35:46.129376Z"}],"euvd":[{"id":"EUVD-2020-19370","description":"SAP HANA Database, version - 2.0, does not correctly validate the username when performing SAML bearer token-based user authentication. It is possible to manipulate a valid existing SAML bearer token to authenticate as a user whose name is identical to the truncated username for whom the SAML bearer token was issued.","status":"published","published":"2020-12-09T16:30:45Z","modified":"2024-08-04T16:03:22Z","cvss":[{"version":"3.0","score":4.2,"vector":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-03T03:07:14.653267Z"}],"ghsa":[{"id":"GHSA-xwh3-6m65-fmmj","title":"SAP HANA Database, version - 2.0, does not correctly validate the username when performing SAML...","description":"SAP HANA Database, version - 2.0, does not correctly validate the username when performing SAML bearer token-based user authentication. It is possible to manipulate a valid existing SAML bearer token to authenticate as a user whose name is identical to the truncated username for whom the SAML bearer token was issued.","status":"published","published":"2022-05-24T17:35:35Z","modified":"2023-01-29T05:05:32Z","cwes":["CWE-287"],"updated_at":"2026-11-02T14:45:48.864861Z"}],"nvd":[{"id":"CVE-2020-26834","description":"SAP HANA Database, version - 2.0, does not correctly validate the username when performing SAML bearer token-based user authentication. It is possible to manipulate a valid existing SAML bearer token to authenticate as a user whose name is identical to the truncated username for whom the SAML bearer token was issued.","status":"published","published":"2020-12-09T17:15:31.323Z","modified":"2026-06-17T03:08:25.227Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"3.0","score":4.2,"vector":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"2.0","score":5.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:06:27.10541Z"}]}}