Vulnerability details
CVE-2026-14537
Google mcp-toolbox
Authorization Bypass in MCP Toolbox Legacy HTTP Endpoints
CVSS 4.0
8.1High
Official description
Incorrect Authorization in the direct HTTP API tool invocation endpoint in Google mcp-toolbox versions v1.3.0 and v1.4.0 allows an unauthenticated attacker to invoke tools protected by the scopeRequired feature via sending tool invocation requests through legacy HTTP endpoints when the --enable-api flag is active.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.1High | 4.0 | CVEProject cvelistV5 (CNA) (Google) | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| mcp-toolbox | 1.3.0 | CVEProject cvelistV5 (CNA) | |
| mcp-toolbox | v1.4.0 | CVEProject cvelistV5 (CNA) |
References and advisories
1
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Details
- Published
- 2026-07-31
- Last updated
- 2026-07-31
- State
- Published
- Assigner (CNA)
Exploit prediction (EPSS)
0.25%
Probability of exploitation in 30 days
16.7%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-863(Incorrect Authorization)