TC-2025-0043 · MCP · MCP

[email protected]

Remote Hosted MCP Server cross-tenant isolation flaw: shared in-memory caching bug in Asana's hosted MCP endpoint exposed tasks, projects, and records across customer organizations for 2 weeks.

Primary advisory (Asana Security Disclosure / UpGuard) Back to all 66 records

Signed ledger verdict

TC-2025-0043

Known bad (exit 2) mcp:[email protected]

IOC & scope: mcp:[email protected] (Cross-Tenant Cache Bleed). Verified by human review and signed into the CC-BY 4.0 OSV v1.6.0 feed.

Credited finder: Asana Security Disclosure / UpGuard ↗
Recorded timestamp: 2025-06-18
Canonical SHA-256: af609d707d440f00…
Local hook action: Block (exit 2)

Run live in Counter Workbench

Signed in /feed.json (.sig).

01 8-Vector Capability X-Ray (ABOM) & OWASP Agentic Crosswalk

Deterministic capability profile and taxonomy mapping.

Every artifact in the threat.cafe ledger is profiled across eight execution vectors and mapped to the OWASP Top 10 for Agentic Applications (ASI01-ASI10) and Agentic Skills & Tools (AST01-AST10).

8-Vector Capability X-Ray (ABOM)

1. Filesystem
Sensitive paths touched: None observed
2. Environment
Variables harvested: None observed
3. Network
Outbound egress domains: mcp.asana.com/sse (cross-tenant state bleed prior to 2025-06-18 patch)
4. Subprocess
Process execution primitives: None observed
5. Lifecycle
Install / startup hooks: None observed
6. OAuth / MCP
Declared scopes: asana:default
7. Obfuscation
Encoding / steganography: None observed
8. Provenance
Attestation status: vendor_disclosed_incident_remediated

Governance & detector mapping

OWASP Agentic ASI (2026): ASI03 (Identity & Privilege Abuse), ASI06 (Memory & Context Poisoning)
OWASP Agentic AST (2026): AST03 (Insecure Credential Handling), AST07 (Cross-Tool Privilege Escalation)
Deterministic rules matched: DRIFT_05_CROSS_TENANT_CACHE_HEADER

Version scoping & related records

No other versions of this package are currently listed on the board. Unlisted versions evaluate to unknown under local policy.yml.

Local CLI verification

$ threat-cafe-hook check "mcp:[email protected]"
[threat.cafe] known_bad: mcp:[email protected] (TC-2025-0043)
  Reason: Remote Hosted MCP Server cross-tenant isolation flaw: shared in-memory caching bug in Asan
  Source: https://www.upguard.com/blog (credited to Asana Security Disclosure / UpGuard)

OSV v1.6.0 machine-readable record

Included in /feed.json under CC-BY 4.0 license and verified by /feed.json.sig.

{
  "schema_version": "1.6.0",
  "id": "TC-2025-0043",
  "modified": "2025-06-18T09:00:00Z",
  "published": "2025-06-18T09:00:00Z",
  "summary": "Remote Hosted MCP Server cross-tenant isolation flaw: shared in-memory caching bug in Asana's hosted MCP endpoint exposed tasks, projects, and records across customer organizations for 2 weeks.",
  "affected": [
    {
      "package": {
        "ecosystem": "mcp",
        "name": "asana-remote-mcp"
      },
      "versions": [
        "2025.06.04"
      ]
    }
  ],
  "credits": [
    {
      "name": "Asana Security Disclosure / UpGuard",
      "type": "FINDER"
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.upguard.com/blog"
    },
    {
      "type": "WEB",
      "url": "https://threat.cafe/incidents/tc-2025-0043/"
    }
  ],
  "database_specific": {
    "target": "mcp:[email protected]",
    "kind": "mcp",
    "verdict": "known_bad",
    "ioc": "mcp:[email protected] (Cross-Tenant Cache Bleed)",
    "artifact_sha256": "af609d707d440f001de266dfec323bbf568f5b6aaa9789924e15be1ab43b76a7",
    "owasp_asi": [
      "ASI03",
      "ASI06"
    ],
    "owasp_ast": [
      "AST03",
      "AST07"
    ],
    "rules_matched": [
      "DRIFT_05_CROSS_TENANT_CACHE_HEADER"
    ],
    "abom": {
      "fs_sensitive": [],
      "env_harvest": [],
      "net_egress": [
        "mcp.asana.com/sse (cross-tenant state bleed prior to 2025-06-18 patch)"
      ],
      "proc_exec": [],
      "install_hooks": [],
      "oauth_scopes": [
        "asana:default"
      ],
      "obfuscation": [],
      "provenance": "vendor_disclosed_incident_remediated"
    },
    "license": "CC-BY-4.0",
    "record_digest": "sha256:46f4c1b7c85d69e24eeb766bea925e540314c2d4a527e9029944f632d471e956",
    "release_signature_url": "https://threat.cafe/feed.json.sig"
  }
}

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