{"id":"CVE-2026-14539","title":"An allocation of resources without limits vulnerability in the HTTP handler component of Google mcp-toolbox versions up to and including 1.4.0 allows an unauthenticated attacker to cause a denial of service (DoS)","summary":"An allocation of resources without limits vulnerability in the HTTP handler component of Google mcp-toolbox versions up to and including 1.4.0 allows an unauthenticated attacker to cause a denial of service (DoS). The /mcp endpoint handl…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-770"],"vendor":"google","product":"mcp_toolbox_for_databases","affected":["mcp_toolbox_for_databases < 1.5.0"],"patched":["mcp_toolbox_for_databases 1.5.0"],"published":"2026-07-31","updated":"2026-08-08","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-14539","references":[{"url":"https://github.com/googleapis/mcp-toolbox/pull/3216","label":"cve-coordination@google.com"}],"tags":["nvd"],"epss":0.0021,"epssPercentile":0.11452,"ingestedAt":"2026-08-08T14:22:57.175Z","slug":"CVE-2026-14539","body":"## Overview\n\nAn allocation of resources without limits vulnerability in the HTTP handler component of Google mcp-toolbox versions up to and including 1.4.0 allows an unauthenticated attacker to cause a denial of service (DoS). The /mcp endpoint handler reads incoming payloads directly into system memory using an unrestricted buffer loop (io.ReadAll) without applying defensive constraints such as http.MaxBytesReader or pre-read Content-Length enforcement. By submitting a single, massive HTTP request body, an attacker can linearly consume available host memory until the runtime process is terminated by an Out-Of-Memory (OOM) error.\n\n## Affected\n\n- `mcp_toolbox_for_databases < 1.5.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `mcp_toolbox_for_databases 1.5.0`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}