CVE-2026-11719

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 96% 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, nvd
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 8.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
41
EG Risk 41/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity81% × 45%
Exploitation0% × 40%
Automatability30% × 15%
EPSS PROB
0.1%
EPSS %ILE
3rd
KEV
Not listed

Published

June 18, 2026

Last Modified

August 17, 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 rangeFix by version rangeDependents
github.com/googleapis/mcp-toolbox—
  • every version up to 1.4.0: fixed in 1.4.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 23× 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.

Showing the most recent 100 of 135 total refreshes for this CVE.

  1. 2026-10-09 20:06 UTCEPSS rescore
  2. 2026-10-07 23:47 UTCEPSS rescore
  3. 2026-10-06 15:17 UTCEPSS rescore
  4. 2026-10-05 17:42 UTCEPSS rescore
  5. 2026-10-04 23:21 UTCEPSS rescore
  6. 2026-10-03 14:25 UTCEPSS rescore
  7. 2026-10-03 05:09 UTCOSV refresh
  8. 2026-10-01 19:49 UTCEPSS rescore
  9. 2026-09-30 15:02 UTCEPSS rescore
  10. 2026-09-29 15:20 UTCEPSS rescore
  11. 2026-09-28 13:50 UTCEPSS rescore
  12. 2026-09-26 15:58 UTCEPSS rescore
  13. 2026-09-23 13:47 UTCEPSS rescore
  14. 2026-09-20 20:15 UTCEPSS rescore
  15. 2026-09-18 19:27 UTCEPSS rescore
  16. 2026-09-16 05:14 UTCEPSS rescore
  17. 2026-09-14 02:20 UTCEG score recompute
  18. 2026-09-13 16:46 UTCEPSS rescore
  19. 2026-09-13 13:55 UTCEG score recompute
  20. 2026-09-12 15:00 UTCEPSS rescore
  21. 2026-09-11 14:52 UTCEPSS rescore
  22. 2026-09-11 09:36 UTCEPSS rescore
  23. 2026-09-10 09:34 UTCEPSS rescore
  24. 2026-09-08 22:00 UTCEPSS rescore
  25. 2026-09-07 16:01 UTCEPSS rescore
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  1. 2026-09-06 13:47 UTCEPSS rescore
  2. 2026-09-04 05:06 UTCEPSS rescore
  3. 2026-09-02 14:11 UTCEPSS rescore
  4. 2026-09-01 13:53 UTCEPSS rescore
  5. 2026-09-01 04:39 UTCEPSS rescore
  6. 2026-08-30 20:59 UTCEG score recompute
  7. 2026-08-30 19:17 UTCEPSS rescore
  8. 2026-08-30 01:21 UTCEPSS rescore
  9. 2026-08-28 21:40 UTCEPSS rescore
  10. 2026-08-27 14:24 UTCEPSS rescore
  11. 2026-08-25 13:48 UTCEPSS rescore
  12. 2026-08-24 15:03 UTCEG score recompute
  13. 2026-08-23 01:11 UTCEG score recompute
  14. 2026-08-23 00:19 UTCEPSS rescore
  15. 2026-08-21 23:48 UTCEPSS rescore
  16. 2026-08-21 07:55 UTCEG score recompute
  17. 2026-08-20 22:55 UTCEPSS rescore
  18. 2026-08-20 08:09 UTCEG score recompute
  19. 2026-08-19 17:03 UTCEPSS rescore
  20. 2026-08-19 07:43 UTCEG score recompute
  21. 2026-08-18 13:48 UTCEPSS rescore
  22. 2026-08-17 16:02 UTCEG score recompute▼ 0.50
  23. 2026-08-17 16:01 UTCNVD updateCVSS v3 → 8.1
  24. 2026-08-16 20:45 UTCEG score recompute
  25. 2026-08-16 14:56 UTCEPSS rescore
  26. 2026-08-16 08:56 UTCEG score recompute
  27. 2026-08-16 02:14 UTCEPSS rescore
  28. 2026-08-15 09:06 UTCEG score recompute
  29. 2026-08-15 01:30 UTCEPSS rescore
  30. 2026-08-14 06:50 UTCEG score recompute
  31. 2026-08-13 22:00 UTCEPSS rescore
  32. 2026-08-12 16:47 UTCEG score recompute
  33. 2026-08-12 13:50 UTCEPSS rescore
  34. 2026-08-11 17:10 UTCEG score recompute
  35. 2026-08-11 13:42 UTCEPSS rescore
  36. 2026-08-11 05:17 UTCEG score recompute
  37. 2026-08-10 23:59 UTCEPSS rescore
  38. 2026-08-09 16:32 UTCEG score recompute
  39. 2026-08-09 13:46 UTCEPSS rescore
  40. 2026-08-07 17:19 UTCEG score recompute
  41. 2026-08-06 17:42 UTCEG score recompute
  42. 2026-08-06 13:46 UTCEPSS rescore
  43. 2026-08-06 05:54 UTCEG score recompute
  44. 2026-08-05 19:17 UTCEPSS rescore
  45. 2026-08-04 15:23 UTCEG score recompute
  46. 2026-08-04 15:09 UTCEPSS rescore
  47. 2026-08-04 10:38 UTCEPSS rescore
  48. 2026-08-03 21:24 UTCEG score recompute
  49. 2026-08-03 10:35 UTCEPSS rescore
  50. 2026-08-02 09:58 UTCEG score recompute
  51. 2026-08-02 02:26 UTCEPSS rescore
  52. 2026-08-01 10:21 UTCEG score recompute
  53. 2026-08-01 04:15 UTCEPSS rescore
  54. 2026-07-30 22:28 UTCEG score recompute
  55. 2026-07-30 16:27 UTCEPSS rescore
  56. 2026-07-30 03:07 UTCEG score recompute
  57. 2026-07-30 01:30 UTCEPSS rescore
  58. 2026-07-29 01:46 UTCEG score recompute
  59. 2026-07-28 15:36 UTCEPSS rescore
  60. 2026-07-27 22:14 UTCEG score recompute
  61. 2026-07-27 14:13 UTCEPSS rescore
  62. 2026-07-26 17:40 UTCEG score recompute
  63. 2026-07-25 14:17 UTCEPSS rescore
  64. 2026-07-24 14:17 UTCEPSS rescore
  65. 2026-07-23 14:18 UTCEPSS rescore
  66. 2026-07-23 03:04 UTCEG score recompute
  67. 2026-07-22 14:08 UTCEPSS rescore
  68. 2026-07-21 15:24 UTCEPSS rescore
  69. 2026-07-20 17:08 UTCEPSS rescore
  70. 2026-07-19 14:30 UTCEPSS rescore
  71. 2026-07-19 02:28 UTCEPSS rescore
  72. 2026-07-18 10:04 UTCEPSS rescore
  73. 2026-07-16 17:02 UTCEPSS rescore
  74. 2026-07-15 16:57 UTCEPSS rescore
  75. 2026-07-15 02:00 UTCEPSS rescore

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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 on June 18, 2026, with the most recent update on August 17, 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 0.1% probability of exploitation in the next 30 days (3rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-11719?
CVE-2026-11719 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-11719?
A fix for CVE-2026-11719 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-11719 are linked in the Vendor Advisories panel on this page.

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