{"id":"CVE-2026-75878","title":"IBM Sterling File Gateway could allow a remote attacker to bypass authentication and obtain a fully authenticated session due to improper authentication via an unvalidated SSO header.","summary":"IBM Sterling File Gateway could allow a remote attacker to bypass authentication and obtain a fully authenticated session due to improper authentication via an unvalidated SSO header.","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-287"],"vendor":"IBM","product":"Sterling File Gateway","affected":["sterling_file_gateway >= 6.2.0.0 <= 6.2.0.6_1, 6.2.1.0 - 6.2.1.2, 6.2.2.0 - 6.2.2.1"],"published":"2026-09-18","updated":"2026-09-19","sourceUpdated":"2026-09-19T15:17:00.883","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-75878","references":[{"url":"https://www.ibm.com/support/pages/node/7287497","label":"psirt@us.ibm.com"}],"tags":["nvd","cve.org"],"epss":0.00476,"epssPercentile":0.40175,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-19T13:37:06.804390Z"},"ingestedAt":"2026-09-18T19:49:30.594Z","slug":"CVE-2026-75878","body":"## Overview\n\nIBM Sterling File Gateway could allow a remote attacker to bypass authentication and obtain a fully authenticated session due to improper authentication via an unvalidated SSO header.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":50.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}