MCP Context Forge: Hardcoded default JWT_SECRET_KEY shipped in source and .env.example enables pre-authentication platform admin token forgery

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-53709
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-13 15:17:44 UTC
Updated2026-10-16 22:17:23 UTC
DescriptionMCP Context Forge is an MCP gateway and administrative platform. Prior to 1.0.2, mcpgateway/config.py and .env.example ship a known JWT_SECRET_KEY, while verify_jwt_token() accepts HS256 tokens signed with that key and get_current_user() creates a platform administrator when the token subject matches PLATFORM_ADMIN_EMAIL and REQUIRE_USER_IN_DB is false. A remote unauthenticated attacker can therefore mint accepted administrator tokens without a database account. While the vulnerable signing key remains configured and the platform-admin bootstrap remains enabled, forged access survives password rotation, account deletion, and session revocation, allowing administrative disclosure, modification, and service disruption. This issue is fixed in version 1.0.2.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.004520000 probability, percentile 0.377820000 (date 2026-10-16)

Problem Types: CWE-287 | CWE-321 | CWE-798 | CWE-1188 | CWE-287 CWE-287: Improper Authentication | CWE-321 CWE-321: Use of Hard-coded Cryptographic Key | CWE-798 CWE-798: Use of Hard-coded Credentials | CWE-1188 CWE-1188: Insecure Default Initialization of Resource

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA IBM Mcp-context-forge affected < 1.0.2 Not specified

References

ReferenceSourceLinkTags
github.com/IBM/mcp-context-forge/commit/2af690f894b6e35f5f21190fdab1505f... [email protected] github.com
github.com/IBM/mcp-context-forge/releases/tag/v1.0.2 [email protected] github.com
github.com/IBM/mcp-context-forge/security/advisories/GHSA-m8rv-5m6m-32ff [email protected] github.com
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