GoogleCVE-2026-14537
Google mcp-toolbox: improper authorization
High8.1CVE-2026-14537 · Published Jul 31, 2026 · updated Aug 8, 2026
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| mcp-toolbox Product | <= 1.3.0 | No fix yet |
| <= v1.4.0 | No fix yet |
Details and references
- CVSS 4.0
- 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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-863
More Google advisories
All Google| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Jul 31 | Google mcp-toolbox: authentication bypass | High8.0 | No fix yet |
| Jul 31 | Google mcp-toolbox: server-side request forgery | High8.0 | No fix yet |
| Jul 31 | Google mcp-toolbox: improper authorization | Medium5.7 | No fix yet |
| Jul 31 | Google mcp-toolbox: denial of service | Medium6.6 | No fix yet |
| Jul 30 | Google Chrome: spoofing | Medium4.3 | 151.0.7922.72 |
| Jul 30 | Google Chrome: remote attacker could bypass navigation restrictions | Medium6.5 | 151.0.7922.72 |