CVE-2026-11719

HIGHPre-NVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 95% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
8.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.6Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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).

CVSS v3
8.6
EG Score
8.6(medium)
EPSS
4.6%
KEV
Not listed

Published

June 18, 2026

Last Modified

June 22, 2026

Advisory Details (2)

Auto-updated Jun 22, 2026
Patch available. Sources: github_pr.
github_pr Patch Available

fix(server/auth): centralize tool scopes validation

Patch available: googleapis/mcp-toolbox v1.4.0 (PR #3335 merged 2026-06-03)

https://github.com/googleapis/mcp-toolbox/pull/3335
github_pr Patch Available

feat(auth): implement MCP auth tool-level scopes validation

Patch available: googleapis/mcp-toolbox v1.3.0 (PR #3049 merged 2026-05-13)

https://github.com/googleapis/mcp-toolbox/pull/3049

Vendor Advisories for CVE-2026-11719(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/googleapis/mcp-toolbox—1.4.0—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 22× in last 7d / 56× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 21:39 UTCEG score recompute
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 08:13 UTCEG score recompute
  4. 2026-07-06 02:23 UTCEPSS rescore
  5. 2026-07-05 20:07 UTCEG score recompute
  6. 2026-07-05 08:18 UTCEG score recompute
  7. 2026-07-05 02:30 UTCEPSS rescore
  8. 2026-07-05 02:30 UTCEPSS rescore
  9. 2026-07-04 20:27 UTCEG score recompute
  10. 2026-07-04 08:39 UTCEG score recompute
  11. 2026-07-04 06:31 UTCEPSS rescore
  12. 2026-07-03 20:50 UTCEG score recompute
  13. 2026-07-03 09:00 UTCEG score recompute
  14. 2026-07-02 21:11 UTCEG score recompute
  15. 2026-07-02 09:23 UTCEG score recompute
  16. 2026-07-01 21:34 UTCEG score recompute
  17. 2026-07-01 15:06 UTCEPSS rescore
  18. 2026-07-01 15:06 UTCEPSS rescore
  19. 2026-07-01 09:43 UTCEG score recompute
  20. 2026-06-30 23:22 UTCEPSS rescore
  21. 2026-06-30 21:53 UTCEG score recompute
  22. 2026-06-30 10:04 UTCEG score recompute
  23. 2026-06-29 22:07 UTCEG score recompute
  24. 2026-06-29 14:06 UTCEPSS rescore
  25. 2026-06-29 10:18 UTCEG score recompute
Show 31 more
  1. 2026-06-28 22:30 UTCEG score recompute
  2. 2026-06-28 14:07 UTCEPSS rescore
  3. 2026-06-28 10:41 UTCEG score recompute
  4. 2026-06-28 04:56 UTCEPSS rescore
  5. 2026-06-28 04:56 UTCEPSS rescore
  6. 2026-06-27 22:53 UTCEG score recompute
  7. 2026-06-27 11:04 UTCEG score recompute
  8. 2026-06-27 03:08 UTCEPSS rescore
  9. 2026-06-26 23:15 UTCEG score recompute
  10. 2026-06-26 11:25 UTCEG score recompute
  11. 2026-06-25 20:34 UTCEG score recompute
  12. 2026-06-25 13:49 UTCEPSS rescore
  13. 2026-06-25 08:45 UTCEG score recompute
  14. 2026-06-24 20:57 UTCEG score recompute
  15. 2026-06-24 14:05 UTCEPSS rescore
  16. 2026-06-24 09:08 UTCEG score recompute
  17. 2026-06-23 21:32 UTCEPSS rescore
  18. 2026-06-23 21:19 UTCEG score recompute
  19. 2026-06-23 09:31 UTCEG score recompute
  20. 2026-06-22 21:40 UTCEG score recompute▲ 8.60
  21. 2026-06-22 21:36 UTCNVD updateCVSS v3 → 8.6 · CVSS v4 → 8.6
  22. 2026-06-22 14:25 UTCEPSS rescore
  23. 2026-06-22 14:25 UTCEPSS rescore
  24. 2026-06-21 16:41 UTCEG score recompute
  25. 2026-06-21 14:56 UTCEPSS rescore
  26. 2026-06-21 14:56 UTCEPSS rescore
  27. 2026-06-21 01:59 UTCEPSS rescore
  28. 2026-06-21 01:59 UTCEPSS rescore
  29. 2026-06-19 19:25 UTCEPSS rescore
  30. 2026-06-18 15:45 UTCEG score recompute
  31. 2026-06-18 15:45 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-11719?
CVE-2026-11719 is a high vulnerability published on June 18, 2026. 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…
When was CVE-2026-11719 disclosed?
CVE-2026-11719 was first published in the National Vulnerability Database on June 18, 2026, with the most recent update on June 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-11719 actively exploited?
CVE-2026-11719 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-11719?
CVE-2026-11719 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-11719?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-11719, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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