CVE-2026-14537

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-31. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

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.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: Track

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
Severity98% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
12%
KEV
Not listed

Published

July 31, 2026

Last Modified

August 8, 2026

Advisory Details (1)

Auto-updated Aug 15, 2026
Patch available. Sources: github_pr.
github_pr Patch Available

fix(server): fail if MCP auth is enabled together with enable-api

Patch available: googleapis/mcp-toolbox v1.5.0 (PR #3435 merged 2026-06-18)

https://github.com/googleapis/mcp-toolbox/pull/3435

Vendor Advisories for CVE-2026-14537(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 53× in last 7d / 135× 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. 2026-08-21 01:00 UTCEG score recompute
  2. 2026-08-21 01:00 UTCGHSA enrichment
  3. 2026-08-20 22:55 UTCEPSS rescore
  4. 2026-08-20 20:55 UTCGHSA enrichment
  5. 2026-08-20 16:50 UTCGHSA enrichment
  6. 2026-08-20 12:35 UTCGHSA enrichment
  7. 2026-08-20 08:29 UTCGHSA enrichment
  8. 2026-08-20 04:24 UTCGHSA enrichment
  9. 2026-08-20 00:18 UTCGHSA enrichment
  10. 2026-08-19 20:12 UTCEG score recompute
  11. 2026-08-19 20:12 UTCGHSA enrichment
  12. 2026-08-19 17:03 UTCEPSS rescore
  13. 2026-08-19 16:00 UTCGHSA enrichment
  14. 2026-08-19 11:39 UTCGHSA enrichment
  15. 2026-08-19 07:33 UTCGHSA enrichment
  16. 2026-08-19 03:25 UTCGHSA enrichment
  17. 2026-08-18 22:31 UTCGHSA enrichment
  18. 2026-08-18 18:26 UTCEG score recompute
  19. 2026-08-18 18:26 UTCGHSA enrichment
  20. 2026-08-18 13:48 UTCEPSS rescore
  21. 2026-08-18 12:52 UTCGHSA enrichment
  22. 2026-08-18 07:59 UTCGHSA enrichment
  23. 2026-08-18 03:53 UTCGHSA enrichment
  24. 2026-08-17 23:48 UTCGHSA enrichment
  25. 2026-08-17 19:42 UTCGHSA enrichment
Show 75 more
  1. 2026-08-17 14:14 UTCEG score recompute
  2. 2026-08-17 14:14 UTCGHSA enrichment
  3. 2026-08-17 10:08 UTCGHSA enrichment
  4. 2026-08-17 06:02 UTCGHSA enrichment
  5. 2026-08-17 01:53 UTCGHSA enrichment
  6. 2026-08-16 21:47 UTCGHSA enrichment
  7. 2026-08-16 17:41 UTCEG score recompute
  8. 2026-08-16 17:41 UTCGHSA enrichment
  9. 2026-08-16 14:56 UTCEPSS rescore
  10. 2026-08-16 13:21 UTCGHSA enrichment
  11. 2026-08-16 09:15 UTCGHSA enrichment
  12. 2026-08-16 05:10 UTCEG score recompute
  13. 2026-08-16 05:10 UTCGHSA enrichment
  14. 2026-08-16 02:14 UTCEPSS rescore
  15. 2026-08-16 01:04 UTCGHSA enrichment
  16. 2026-08-15 20:58 UTCGHSA enrichment
  17. 2026-08-15 16:52 UTCGHSA enrichment
  18. 2026-08-15 12:46 UTCGHSA enrichment
  19. 2026-08-15 08:40 UTCGHSA enrichment
  20. 2026-08-15 04:34 UTCEG score recompute
  21. 2026-08-15 04:34 UTCGHSA enrichment
  22. 2026-08-15 01:30 UTCEPSS rescore
  23. 2026-08-15 00:28 UTCGHSA enrichment
  24. 2026-08-14 20:23 UTCGHSA enrichment
  25. 2026-08-14 16:17 UTCGHSA enrichment
  26. 2026-08-14 12:12 UTCGHSA enrichment
  27. 2026-08-14 08:07 UTCGHSA enrichment
  28. 2026-08-14 04:01 UTCGHSA enrichment
  29. 2026-08-13 23:56 UTCEG score recompute
  30. 2026-08-13 23:56 UTCGHSA enrichment
  31. 2026-08-13 22:00 UTCEPSS rescore
  32. 2026-08-13 19:50 UTCGHSA enrichment
  33. 2026-08-13 15:44 UTCGHSA enrichment
  34. 2026-08-13 11:38 UTCGHSA enrichment
  35. 2026-08-13 07:33 UTCGHSA enrichment
  36. 2026-08-13 03:27 UTCGHSA enrichment
  37. 2026-08-12 23:21 UTCGHSA enrichment
  38. 2026-08-12 19:16 UTCGHSA enrichment
  39. 2026-08-12 15:10 UTCEG score recompute
  40. 2026-08-12 15:10 UTCGHSA enrichment
  41. 2026-08-12 13:50 UTCEPSS rescore
  42. 2026-08-12 11:04 UTCGHSA enrichment
  43. 2026-08-12 06:58 UTCGHSA enrichment
  44. 2026-08-12 02:52 UTCGHSA enrichment
  45. 2026-08-11 22:47 UTCGHSA enrichment
  46. 2026-08-11 18:40 UTCGHSA enrichment
  47. 2026-08-11 14:33 UTCEG score recompute
  48. 2026-08-11 14:33 UTCGHSA enrichment
  49. 2026-08-11 13:42 UTCEPSS rescore
  50. 2026-08-11 10:26 UTCGHSA enrichment
  51. 2026-08-11 06:21 UTCGHSA enrichment
  52. 2026-08-11 02:15 UTCEG score recompute
  53. 2026-08-11 02:15 UTCGHSA enrichment
  54. 2026-08-10 23:59 UTCEPSS rescore
  55. 2026-08-10 22:10 UTCGHSA enrichment
  56. 2026-08-10 18:04 UTCGHSA enrichment
  57. 2026-08-10 13:58 UTCGHSA enrichment
  58. 2026-08-10 09:53 UTCGHSA enrichment
  59. 2026-08-10 05:47 UTCGHSA enrichment
  60. 2026-08-10 01:42 UTCGHSA enrichment
  61. 2026-08-09 21:36 UTCGHSA enrichment
  62. 2026-08-09 17:30 UTCEG score recompute
  63. 2026-08-09 17:30 UTCGHSA enrichment
  64. 2026-08-09 13:46 UTCEPSS rescore
  65. 2026-08-09 13:24 UTCGHSA enrichment
  66. 2026-08-09 09:19 UTCGHSA enrichment
  67. 2026-08-09 05:14 UTCGHSA enrichment
  68. 2026-08-09 01:09 UTCGHSA enrichment
  69. 2026-08-08 21:03 UTCGHSA enrichment
  70. 2026-08-08 16:57 UTCEG score recompute
  71. 2026-08-08 16:57 UTCGHSA enrichment
  72. 2026-08-08 16:37 UTCEPSS rescore
  73. 2026-08-08 12:51 UTCGHSA enrichment
  74. 2026-08-08 08:45 UTCGHSA enrichment
  75. 2026-08-08 04:40 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-14537?
CVE-2026-14537 is a critical vulnerability published on July 31, 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…
When was CVE-2026-14537 disclosed?
CVE-2026-14537 was first published in the National Vulnerability Database on July 31, 2026, with the most recent update on August 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-14537 actively exploited?
CVE-2026-14537 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 87.7% of all scored CVEs.
What is the CVSS score of CVE-2026-14537?
CVE-2026-14537 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-14537?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-14537, 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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