PatchTheCVECVE-2026-14539: An allocation of resources without limits vulnerability in the HTTP handler component of Google mcp-toolbox ve
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Routine
HIGH 7.5REMOTEUPGRADE
CVE-2026-14539 is a high-severity flaw (CVSS 7.5) affecting mcp toolbox for databases. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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 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 s
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.2% (top 86%) |
| CISA exploited list | No |
| Weakness | CWE-770 |
| Published | 2026-07-31 |
| Last modified | 2026-10-23 |
Publisher (CNA): Google Inc. · Vendor: google
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
google mcp toolbox for databases UPGRADE
Affected: < 1.5.0
Fixed in: 1.5.0
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy mcp-toolbox-for-databases || rpm -q mcp-toolbox-for-databases || mcp-toolbox-for-databases --version
2. UPGRADE to 1.5.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade mcp-toolbox-for-databases
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade mcp-toolbox-for-databases
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Related CVEs
- CVE-2026-14537 CRITICAL 9.8 DOWNGRADE Incorrect Authorization in the direct HTTP API tool invocation endpoint in Google mcp-toolbox versions v1.3.0
- CVE-2026-14541 HIGH 7.5 DOWNGRADE An authentication bypass and audience confusion vulnerability exists in the Google OAuth provider component of
- CVE-2026-14538 HIGH 7.7 UPGRADE An improper authorization and security-boundary bypass vulnerability in the bigquery-execute-sql tool componen
- CVE-2026-14540 MEDIUM 6.1 UPGRADE A Server-Side Request Forgery (SSRF) vulnerability exists in the generic HTTP source and tool components of Go