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  4. CVE 2026 53709 mcp context forge hardcoded default jwtsecretkey
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Back to active CVEs
Critical · CVSS 9.8CVE-2026-53709

MCP Context Forge: Hardcoded default JWT_SECRET_KEY shipped in source and .env.example enables pre-authentication platform admin token forgeryCVE-2026-53709

Answer in brief

CVE-2026-53709 records a Critical severity (CVSS 9.8) vulnerability in MCP Context Forge: Hardcoded default JWT_SECRET_KEY shipped in source and .env.example enables pre-authentication platform admin token forgery. The current sources do not mark it as known exploited. The current feed maps IBM/mcp-context-forge (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 13, 2026Updated Oct 13, 2026Source checked Oct 13, 2026First seen by HOL Oct 13, 2026Material review Oct 13, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.8
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps IBM/mcp-context-forge (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
IBM/mcp-context-forgegeneric<1.0.21.0.2

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for IBM/mcp-context-forge.
  2. 2Review the reported fix. Update IBM/mcp-context-forge to 1.0.2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 13, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 13, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 13, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source description

MCP 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • MCP ContextForge: Global Prompts stored cross-site scripting compromises the Admin UISame ibm/mcp-context-forge package
  • Huawei Default SNMPv3 USM keyAlso CWE-321
  • UEFI OOB Write and Buffer Overflow VulnerabilitiesSame generic ecosystem
  • UEFI OOB Write and Buffer Overflow VulnerabilitiesSame generic ecosystem
  • UEFI OOB Write and Buffer Overflow VulnerabilitiesSame generic ecosystem
  • UEFI OOB Write and Buffer Overflow VulnerabilitiesSame generic ecosystem

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-287, CWE-321, CWE-798, CWE-1188
Source
CVE List V5
Source checked
Oct 13, 2026
References
3 linked sources
Open source record