{"id":"CVE-2026-111633","summary":"ZKEACMS through 4.4 Authentication Bypass via Hard-Coded JWT Signing Key","details":"ZKEACMS through 4.4 contains an authentication bypass vulnerability that allows unauthenticated attackers to forge REST API JWT bearer tokens using a hard-coded HMAC-SHA256 signing key in JwtBearerDefaults.cs. Attackers can sign a token with the Name claim set to 'admin' to call ApiAuthorize endpoints, modifying articles and products and reading form submissions.","modified":"2026-10-24T02:48:16.877027725Z","published":"2026-10-16T17:39:06.226Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-321"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111633.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111633.json"},{"type":"ADVISORY","url":"https://hackmd.io/@hieuPenguinnn/zkeacms-hardcoded-jwt-signing-key-admin-auth-bypass"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111633"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/zkeacms-through-4.4-authentication-bypass-via-hard-coded-jwt-signing-key"},{"type":"REPORT","url":"https://github.com/SeriaWei/ZKEACMS/issues/531"},{"type":"PACKAGE","url":"https://github.com/SeriaWei/ZKEACMS"},{"type":"ARTICLE","url":"https://github.com/SeriaWei/ZKEACMS/blob/v4.4/src/ZKEACMS/Api/JwtBearerDefaults.cs#L14-L19"},{"type":"ARTICLE","url":"https://github.com/SeriaWei/ZKEACMS/blob/v4.4/src/ZKEACMS/BuilderAuthentication.cs#L41-L52"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/seriawei/zkeacms","events":[{"introduced":"0"},{"last_affected":"2c21b31322b630bb364c67ab71fbd698e9ff4280"}],"database_specific":{"extracted_events":[{"strategy":"StandardRange","range":[{"introduced":"0"},{"last_affected":"4.4"}],"source":"AFFECTED_FIELD"},{"range":[{"introduced":"0"},{"last_affected":"4.4"}],"source":"DESCRIPTION"}]}}],"versions":["v4.4","v4.3","v3.9.4","v3.9.3","v3.9.2","v3.9.1","v3.9","v3.8","v3.7","v3.6.2","v3.6.1","v3.6","v3.5.6","v3.5.5","v3.5.4","v3.5.2","v3.5.1","v3.5","v3.4.5","v3.4.4","v3.4.3","v3.4.2","v3.4.1","v3.4","v3.3.7","v3.3.6","v3.3.5","v3.3.4","v3.3.3","v3.2.0","v3.3.2","v3.3.1.0","v3.3.1","v3.3","v3.2.3","v3.2.2","v3.2.1","v3.1.9","v3.1.7","v3.1.5","v3.1.4","v3.1.3","v1.2","v1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-111633.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N"}]}