CVE-2026-16498CWE-488

CVE-2026-16498

Critical · published July 28, 2026

CVSS v3.1
10.0
EPSS
0%
Percentile
38.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
10.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L
CVSS v4.0
Not supplied
EPSS
0.00456 · 38.6th percentile
Weakness
CWE-488 · Exposure of Data Element to Wrong Session
Published
2026-07-28T23:17Z
References (1)
https://discuss.hashicorp.com/t/hcsec-2026-23-multiple-vulnerabilities-impacting-hashicorp-terraform-mcp-server/77606 · [email protected]
EPSS history
Timeline
  • 28 JUL 17:57Z
    terraform-mcp-server vulnerable to cross-tenant credential reuse in streamable-HTTP stateless mode
    cvelistv5