CVE-2026-16498

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-28. a secondary CVSS source baseline 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
10.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 10.0Exploit: None knownExposed: 0

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

The terraform-mcp-server before version 1.1.0 is vulnerable to a cross-tenant credential reuse issue in the streamable-HTTP stateless transport mode that may allow one user's Terraform token to be used to execute tool calls on behalf of subsequent users. This vulnerability, CVE-2026-16498, is fixed in terraform-mcp-server 1.1.0.

CVSS v3
10.0
EG Score
10.0(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity100% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
38%
KEV
Not listed

Published

July 28, 2026

Last Modified

July 30, 2026

Advisory Details (1)

Auto-updated Sep 10, 2026
No patch confirmed yet.
generic

HCSEC-2026-23 - Multiple vulnerabilities impacting HashiCorp Terraform MCP Server - Security - HashiCorp Discuss

https://discuss.hashicorp.com/t/hcsec-2026-23-multiple-vulnerabilities-impacting-hashicorp-terraform-mcp-server/77606

Vendor Advisories for CVE-2026-16498(2)

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 38× in last 7d / 171× 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 336 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-16498?
CVE-2026-16498 is a critical vulnerability published on July 28, 2026. The terraform-mcp-server before version 1.1.0 is vulnerable to a cross-tenant credential reuse issue in the streamable-HTTP stateless transport mode that may allow one user's Terraform token to be used to execute tool calls on behalf of subsequent users. This vulnerability, CVE-2026-16498, is fixed…
When was CVE-2026-16498 disclosed?
CVE-2026-16498 was first published in the National Vulnerability Database on July 28, 2026, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16498 actively exploited?
CVE-2026-16498 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 61.7% of all scored CVEs.
What is the CVSS score of CVE-2026-16498?
CVE-2026-16498 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-16498?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16498, 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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