CVE-2026-11719: An authenticated authorization bypass vulnerability exists in MCP Toolbox for Databases due to missing scope e

Routine

HIGH 8.1DOWNGRADE

CVE-2026-11719 is a high-severity flaw (CVSS 8.1) affecting mcp toolbox for databases. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 96%)
CISA exploited list	No
Weakness	CWE-862
Published	2026-06-18
Last modified	2026-10-26

Publisher (CNA): Google Inc. · Vendor: google

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-18 14:17 UTCPublished CVE record published
2026-10-26 11:10 UTCUpdated Record last modified

google mcp toolbox for databases DOWNGRADE

Affected: 1.3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.3.0

1. Check installed version

apt-cache policy mcp-toolbox-for-databases || rpm -q mcp-toolbox-for-databases || mcp-toolbox-for-databases --version

2. No fixed release: DOWNGRADE to a release before 1.3.0 (Debian / Ubuntu)

apt-cache madison mcp-toolbox-for-databases sudo apt install mcp-toolbox-for-databases=<VERSION_BEFORE_1.3.0> sudo apt-mark hold mcp-toolbox-for-databases

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list mcp-toolbox-for-databases sudo dnf downgrade mcp-toolbox-for-databases-<VERSION_BEFORE_1.3.0> sudo dnf versionlock add mcp-toolbox-for-databases

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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.

Quick answers

How do I fix CVE-2026-11719?

mcp toolbox for databases: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-11719 being exploited?

CVE-2026-11719 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-11719 affect?

CVE-2026-11719 affects mcp toolbox for databases. Severity is high (CVSS 8.1). 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

How urgent is CVE-2026-11719?

Priority 29/100. High severity

Related CVEs

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References

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