CVE-2026-14541

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-31. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

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

An authentication bypass and audience confusion vulnerability exists in the Google OAuth provider component of Google mcp-toolbox version 1.4.0. When a Google authService is initialized with mcpEnabled: true but lacks an explicitly defined audience or clientId, the ValidateMCPAuth pipeline for opaque tokens skips audience validation entirely. As a result, the toolbox will accept any valid Google OAuth access token—even those minted for unrelated ecosystem applications—granting unauthorized clients access to protected tools and data backends.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
14%
KEV
Not listed

Published

July 31, 2026

Last Modified

August 8, 2026

Advisory Details (1)

Auto-updated Jul 31, 2026
Patch available. Sources: github_pr.
github_pr Patch Available

feat(auth/google): require audience or clientId for mcpEnabled

Patch available: googleapis/mcp-toolbox v1.5.0 (PR #3450 merged 2026-06-18)

https://github.com/googleapis/mcp-toolbox/pull/3450

Vendor Advisories for CVE-2026-14541(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 23× in last 7d / 97× 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 173 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-14541?
CVE-2026-14541 is a high vulnerability published on July 31, 2026. An authentication bypass and audience confusion vulnerability exists in the Google OAuth provider component of Google mcp-toolbox version 1.4.0. When a Google authService is initialized with mcpEnabled: true but lacks an explicitly defined audience or clientId, the ValidateMCPAuth pipeline for…
When was CVE-2026-14541 disclosed?
CVE-2026-14541 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-2026-14541 actively exploited?
CVE-2026-14541 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 85.7% of all scored CVEs.
What is the CVSS score of CVE-2026-14541?
CVE-2026-14541 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-14541?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-14541, 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.

Dependency Blast Radius

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