{"id":"CVE-2026-56022","aliases":["EUVD-2026-37907","GHSA-9848-6qgw-2748"],"status":"published","title":"Webmin MFA bypass","description":"Webmin accepts basic authentication without session cookies when an attacker provides the 'User-Agent: webmin' header, allowing bypass of additional MFA requirements. Fixed in 2.640.","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00555,"percentile":0.46613,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-308"],"published":"2026-06-18T16:11:22Z","modified":"2026-10-28T02:31:03Z","products":[{"vendor":"webmin","product":"webmin"}],"references":[{"url":"https://webmin.com/security/#webmin-prior-to-2640","tags":["release-notes","Vendor Advisory","advisory"]},{"url":"https://github.com/webmin/webmin/releases/tag/2.640","tags":["release-notes","Release Notes","advisory"]},{"url":"https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-169-02.json","tags":["third-party-advisory","VDB Entry","advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-56022","tags":["vdb-entry","VDB Entry","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56022","tags":["advisory"]},{"url":"https://github.com/webmin/webmin/releases/tag/2.641"},{"url":"https://webmin.com/security/#webmin-prior-to-2641"},{"url":"https://github.com/advisories/GHSA-9848-6qgw-2748"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56022.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-56022","title":"Webmin MFA bypass","description":"Webmin accepts basic authentication without session cookies when an attacker provides the 'User-Agent: webmin' header, allowing bypass of additional MFA requirements. Fixed in 2.640.","status":"published","published":"2026-06-18T16:11:22.057Z","modified":"2026-08-11T15:33:46.054Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-308"],"updated_at":"2026-11-02T13:36:51.6229Z"}],"euvd":[{"id":"EUVD-2026-37907","description":"Webmin accepts basic authentication without session cookies when an attacker provides the 'User-Agent: webmin' header, allowing bypass of additional MFA requirements. Fixed in 2.640.","status":"published","published":"2026-06-18T16:11:22Z","modified":"2026-08-11T15:33:46Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T18:01:59.926728Z"}],"ghsa":[{"id":"GHSA-9848-6qgw-2748","title":"Webmin accepts basic authentication without session cookies when an attacker provides the 'User...","description":"Webmin accepts basic authentication without session cookies when an attacker provides the 'User-Agent: webmin' header, allowing bypass of additional MFA requirements. Fixed in 2.641.","status":"published","published":"2026-06-18T18:35:24Z","modified":"2026-08-11T18:31:40Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"},{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/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":"medium"}],"cwes":["CWE-308"],"updated_at":"2026-11-02T15:10:20.045782Z"}],"nvd":[{"id":"CVE-2026-56022","description":"Webmin accepts basic authentication without session cookies when an attacker provides the 'User-Agent: webmin' header, allowing bypass of additional MFA requirements. Fixed in 2.640.","status":"published","published":"2026-06-18T17:16:35.53Z","modified":"2026-08-11T17:05:35.883Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/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":"medium","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-308"],"updated_at":"2026-11-02T14:12:24.912854Z"}],"osv":[{"id":"CVE-2026-56022","title":"Webmin MFA bypass","description":"Webmin accepts basic authentication without session cookies when an attacker provides the 'User-Agent: webmin' header, allowing bypass of additional MFA requirements. Fixed in 2.640.","status":"published","published":"2026-06-18T16:11:22.057Z","modified":"2026-10-28T02:31:03.796906869Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-308"],"updated_at":"2026-11-02T15:45:11.609219Z"}]}}