{"id":"CVE-2026-111633","title":"ZKEACMS through 4.4 Authentication Bypass via Hard-Coded JWT Signing Key","summary":"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 …","severity":"high","cvss":8.6,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L","cvssSource":"cna","cwe":["CWE-321"],"vendor":"SeriaWei","product":"ZKEACMS","affected":["ZKEACMS <= 4.4"],"published":"2026-10-16","updated":"2026-10-16","sourceUpdated":"2026-10-16T17:39:06.226Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111633","references":[{"url":"https://hackmd.io/@hieuPenguinnn/zkeacms-hardcoded-jwt-signing-key-admin-auth-bypass"},{"url":"https://github.com/SeriaWei/ZKEACMS/blob/v4.4/src/ZKEACMS/Api/JwtBearerDefaults.cs#L14-L19"},{"url":"https://github.com/SeriaWei/ZKEACMS/blob/v4.4/src/ZKEACMS/BuilderAuthentication.cs#L41-L52"},{"url":"https://github.com/SeriaWei/ZKEACMS/issues/531"},{"url":"https://www.vulncheck.com/advisories/zkeacms-through-4.4-authentication-bypass-via-hard-coded-jwt-signing-key","label":"VulnCheck Advisory: ZKEACMS through 4.4 Authentication Bypass via Hard-Coded JWT Signing Key"}],"tags":["cve.org"],"ingestedAt":"2026-10-16T18:43:08.686Z","slug":"CVE-2026-111633","body":"## Overview\n\nZKEACMS 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.\n\n## Affected\n\n- `ZKEACMS <= 4.4`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":47,"depthScoreParts":{"impact":47.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}