{"affected":[{"defaultStatus":"unknown","product":"code100x","source":"CNA: VulnCheck","vendor":"code100x","versions":[{"lessThan":"90b489ee7c63c301107d6374d4b3f2b8e4060fe5","status":"affected","version":"0","versionType":"custom"},{"lessThan":"88c6c5e94e23da101235c4c7e9c7591ac1016549","status":"affected","version":"0","versionType":"custom"}]}],"cveId":"CVE-2026-8890","cwes":["CWE-639"],"description":"code100x contains an authentication bypass vulnerability in the Mobile API that allows unauthenticated attackers to impersonate arbitrary users by supplying a crafted JSON payload in the 'g' HTTP header. The middleware in middleware.ts skips identity header generation when an Auth-Key header is present without validating its value, allowing attackers to inject a spoofed user identity header that the downstream route handler in the mobile courses endpoint accepts as trusted, granting unauthorized access to course data belonging to any enrolled user or administrator.","epss":{"date":"2026-11-08","percentile":0.42425,"score":0.0049},"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/code100x/cms/issues/1924"},{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/code100x/cms/pull/1927"}],"kev":null,"metrics":[{"score":8.2,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","version":"3.1"},{"score":8.8,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"}],"modifiedAt":1794146959016,"publishedAt":1779819793098,"references":[{"source":"CNA: VulnCheck","tags":["issue-tracking"],"url":"https://github.com/code100x/cms/issues/1924"},{"source":"CNA: VulnCheck","tags":["issue-tracking","patch"],"url":"https://github.com/code100x/cms/pull/1927"},{"source":"CNA: VulnCheck","tags":["issue-tracking","patch"],"url":"https://github.com/code100x/cms/pull/1927/changes/90b489ee7c63c301107d6374d4b3f2b8e4060fe5"},{"source":"CNA: VulnCheck","tags":["issue-tracking","patch"],"url":"https://github.com/code100x/cms/pull/1927/changes/88c6c5e94e23da101235c4c7e9c7591ac1016549"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/code100x-mobile-api-authentication-bypass-via-header-spoofing"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/code100x/cms/issues/1924"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/code100x/cms/pull/1927"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/code100x/cms/pull/1927"},{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/code100x/cms/pull/1927/changes/90b489ee7c63c301107d6374d4b3f2b8e4060fe5"},{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/code100x/cms/pull/1927/changes/88c6c5e94e23da101235c4c7e9c7591ac1016549"}],"revision":"0b04edce498f684ba247a56efbaf5071b4c0aaa63b47894fcf66c8e8b54fb373","sources":[{"modifiedAt":1794146959016,"name":"CNA: VulnCheck","retrievedAt":1794151401367,"url":"https://www.cve.org/CVERecord?id=CVE-2026-8890"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794151408094,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-8890"}],"ssvc":{"assessedAt":1779823526818,"automatable":"yes","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"code100x Mobile API Authentication Bypass via Header Spoofing","updatedAt":1794151408094}