CVE-2026-79537: заобикаляне на вход и права

Описание

Оригинално описание

metatool-ai MetaMCP through 2.4.22 contains an insecure direct object reference (IDOR) in the MCP transport session dispatch. The session store (getSession in session-lifetime-manager.ts) is keyed only by the client-supplied mcp-session-id header with no owner, namespace, or endpoint binding, and the per-endpoint authorization middleware validates only the URL endpoint's owner, never the session. An attacker who supplies another tenant's session id " obtained without authentication from GET /metamcp/health/sessions, which discloses active session IDs and namespace UUIDs " can list and execute the victim tenant's private MCP tools and exfiltrate their data using the victim's forwarded credentials.

Засегнати продукти

• n/a n/a: n/a

Вид слабост

• CWE-639 Authorization Bypass Through User-Controlled Key

История

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-79537
• https://nvd.nist.gov/vuln/detail/CVE-2026-79537
• https://github.com/metatool-ai/metamcp
• https://www.traceforce.ai/security-advisories/cve-2026-79537