CVE-2026-14537

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM 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: 0.3%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
9.8CRITICALmedium confidence
EG Risk
59
EG Risk 59/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.3%
EPSS %ILE
15th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

July 31, 2026

Last Modified

August 8, 2026

Advisory Details (1)

Auto-updated Oct 3, 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 20× in last 7d / 126× 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 347 total refreshes for this CVE.

  1. 2026-10-04 23:54 UTCEG score recompute
  2. 2026-10-04 23:54 UTCGHSA enrichment
  3. 2026-10-04 23:21 UTCEPSS rescore
  4. 2026-10-04 12:29 UTCGHSA enrichment
  5. 2026-10-04 06:34 UTCEG score recompute
  6. 2026-10-04 06:34 UTCGHSA enrichment
  7. 2026-10-03 14:25 UTCEPSS rescore
  8. 2026-10-03 02:47 UTCGHSA enrichment
  9. 2026-10-02 16:54 UTCEG score recompute
  10. 2026-10-02 16:54 UTCGHSA enrichment
  11. 2026-10-01 19:49 UTCEPSS rescore
  12. 2026-10-01 15:20 UTCGHSA enrichment
  13. 2026-10-01 11:15 UTCGHSA enrichment
  14. 2026-10-01 06:56 UTCGHSA enrichment
  15. 2026-10-01 02:50 UTCEG score recompute
  16. 2026-10-01 02:50 UTCGHSA enrichment
  17. 2026-09-30 15:02 UTCEPSS rescore
  18. 2026-09-29 15:20 UTCEPSS rescore
  19. 2026-09-29 06:52 UTCEG score recompute
  20. 2026-09-29 06:51 UTCGHSA enrichment
  21. 2026-09-28 13:51 UTCEPSS rescore
  22. 2026-09-28 12:52 UTCGHSA enrichment
  23. 2026-09-28 07:09 UTCGHSA enrichment
  24. 2026-09-28 02:53 UTCGHSA enrichment
  25. 2026-09-27 18:58 UTCEG score recompute
Show 75 more
  1. 2026-09-27 18:58 UTCGHSA enrichment
  2. 2026-09-27 13:47 UTCEPSS rescore
  3. 2026-09-26 15:58 UTCEPSS rescore
  4. 2026-09-25 09:24 UTCGHSA enrichment
  5. 2026-09-25 04:54 UTCEG score recompute
  6. 2026-09-25 04:54 UTCGHSA enrichment
  7. 2026-09-24 10:10 UTCGHSA enrichment
  8. 2026-09-24 06:04 UTCGHSA enrichment
  9. 2026-09-24 01:32 UTCGHSA enrichment
  10. 2026-09-23 21:27 UTCGHSA enrichment
  11. 2026-09-23 17:03 UTCEG score recompute
  12. 2026-09-23 17:03 UTCGHSA enrichment
  13. 2026-09-23 09:54 UTCGHSA enrichment
  14. 2026-09-23 05:48 UTCGHSA enrichment
  15. 2026-09-23 01:42 UTCGHSA enrichment
  16. 2026-09-22 21:35 UTCEG score recompute
  17. 2026-09-22 21:35 UTCGHSA enrichment
  18. 2026-09-22 13:45 UTCEG score recompute
  19. 2026-09-22 13:45 UTCGHSA enrichment
  20. 2026-09-20 21:14 UTCEG score recompute
  21. 2026-09-20 21:14 UTCGHSA enrichment
  22. 2026-09-20 11:10 UTCGHSA enrichment
  23. 2026-09-20 03:54 UTCGHSA enrichment
  24. 2026-09-19 23:45 UTCEG score recompute
  25. 2026-09-19 23:45 UTCGHSA enrichment
  26. 2026-09-19 08:13 UTCGHSA enrichment
  27. 2026-09-19 04:08 UTCGHSA enrichment
  28. 2026-09-18 22:25 UTCEG score recompute
  29. 2026-09-18 22:25 UTCGHSA enrichment
  30. 2026-09-18 19:27 UTCEPSS rescore
  31. 2026-09-18 17:54 UTCGHSA enrichment
  32. 2026-09-18 13:46 UTCGHSA enrichment
  33. 2026-09-18 09:40 UTCGHSA enrichment
  34. 2026-09-18 05:23 UTCGHSA enrichment
  35. 2026-09-18 01:18 UTCEG score recompute
  36. 2026-09-18 01:18 UTCGHSA enrichment
  37. 2026-09-17 09:38 UTCGHSA enrichment
  38. 2026-09-17 05:32 UTCGHSA enrichment
  39. 2026-09-17 01:26 UTCEG score recompute
  40. 2026-09-17 01:26 UTCGHSA enrichment
  41. 2026-09-16 14:07 UTCEPSS rescore
  42. 2026-09-16 11:21 UTCGHSA enrichment
  43. 2026-09-16 05:31 UTCEG score recompute
  44. 2026-09-16 05:31 UTCGHSA enrichment
  45. 2026-09-16 05:14 UTCEPSS rescore
  46. 2026-09-15 07:17 UTCGHSA enrichment
  47. 2026-09-15 03:11 UTCEG score recompute
  48. 2026-09-15 03:11 UTCGHSA enrichment
  49. 2026-09-14 14:24 UTCGHSA enrichment
  50. 2026-09-14 10:13 UTCGHSA enrichment
  51. 2026-09-14 05:54 UTCGHSA enrichment
  52. 2026-09-14 01:48 UTCGHSA enrichment
  53. 2026-09-13 21:42 UTCGHSA enrichment
  54. 2026-09-13 17:35 UTCEG score recompute
  55. 2026-09-13 17:35 UTCGHSA enrichment
  56. 2026-09-13 16:46 UTCEPSS rescore
  57. 2026-09-13 13:29 UTCGHSA enrichment
  58. 2026-09-13 09:24 UTCGHSA enrichment
  59. 2026-09-13 05:16 UTCGHSA enrichment
  60. 2026-09-13 01:11 UTCGHSA enrichment
  61. 2026-09-12 21:05 UTCGHSA enrichment
  62. 2026-09-12 16:59 UTCEG score recompute
  63. 2026-09-12 16:59 UTCGHSA enrichment
  64. 2026-09-12 15:00 UTCEPSS rescore
  65. 2026-09-12 12:54 UTCGHSA enrichment
  66. 2026-09-12 08:48 UTCGHSA enrichment
  67. 2026-09-12 04:42 UTCGHSA enrichment
  68. 2026-09-12 00:31 UTCGHSA enrichment
  69. 2026-09-11 19:20 UTCGHSA enrichment
  70. 2026-09-11 14:58 UTCEG score recompute
  71. 2026-09-11 14:58 UTCGHSA enrichment
  72. 2026-09-11 14:52 UTCEPSS rescore
  73. 2026-09-11 09:36 UTCEPSS rescore
  74. 2026-09-11 07:18 UTCGHSA enrichment
  75. 2026-09-11 03:12 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 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 0.3% probability of exploitation in the next 30 days (15th percentile of EPSS-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?
A fix for CVE-2026-14537 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-14537 are linked in the Vendor Advisories panel on this page.

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