CVE-2026-111633
ZKEACMS through 4.4 Authentication Bypass via Hard-Coded JWT Signing Key
- State
- Published
- Severity
- 8.8 High
- Published
- Oct 16, 2026
- Updated
- Oct 23, 2026
- Reserved
- Oct 16, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.8 High | 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 | VulnCheck |
| 3.1 | 8.6 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L | VulnCheck |
Weaknesses
- CWE-321 Use of Hard-coded Cryptographic Key
Affected Products
| Product | Versions |
|---|---|
ZKEACMSSeriaWei |
|
References
- https://hackmd.io/@hieuPenguinnn/zkeacms-hardcoded-jwt-signing-key-admin-auth-bypassthird-party-advisory
- https://github.com/SeriaWei/ZKEACMS/blob/v4.4/src/ZKEACMS/Api/JwtBearerDefaults.cs#L14-L19technical-description
- https://github.com/SeriaWei/ZKEACMS/blob/v4.4/src/ZKEACMS/BuilderAuthentication.cs#L41-L52technical-description
- https://github.com/SeriaWei/ZKEACMS/issues/531issue-tracking
- VulnCheck Advisory: ZKEACMS through 4.4 Authentication Bypass via Hard-Coded JWT Signing Keythird-party-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.