CVE-2026-11719

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Source
https://cve.org/CVERecord?id=CVE-2026-11719
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-11719.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-11719
Aliases
Published
2026-06-18T11:55:03.666Z
Modified
2026-07-08T07:59:44.934525161Z
Severity
  • 8.6 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
[none]
Details

An authenticated authorization bypass vulnerability exists in MCP Toolbox for Databases due to missing scope enforcement across older protocol handlers.

While the 2025-11-25 protocol version handler correctly enforces per-tool restrictions defined by scopesRequired, older supported protocol versions (2025-06-18, 2025-03-26, and 2024-11-05) omit this check. An authenticated client with low-privilege tokens (e.g., read) can bypass the intended per-tool scope restrictions and execute high-privilege tools (e.g., admin) simply by specifying an older protocol version in the MCP-Protocol-Version header, or by omitting the header entirely (which causes the server to default to the vulnerable 2024-11-05 handler).

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/11xxx/CVE-2026-11719.json",
    "cna_assigner": "Google",
    "cwe_ids": [
        "CWE-862"
    ]
}
References

Affected packages

Git / github.com/googleapis/mcp-toolbox

Affected ranges

Type
GIT
Repo
https://github.com/googleapis/mcp-toolbox
Events
Introduced
b0010060a939455d91e4f8ba62dc3e72b1892469
Last affected
b0010060a939455d91e4f8ba62dc3e72b1892469
Database specific 
{
    "extracted_events": [
        {
            "introduced": "1.3.0"
        },
        {
            "last_affected": "1.3.0"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

1.*
1.3.0
v1.*
v1.3.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-11719.json"