CVE-2026-16496 — terraform-mcp-server vulnerable to cross-user credential inheritance if an MCP session ID is obtained by another user

CVE-2026-16496

terraform-mcp-server vulnerable to cross-user credential inheritance if an MCP session ID is obtained by another user PUBLISHED

Description (CNA)

The terraform-mcp-server before version 1.1.0 is vulnerable to an authorization bypass in the streamable-HTTP stateful transport mode that may allow a user who obtains another user's MCP session ID to have their tool calls executed using that user's Terraform credentials. This vulnerability, CVE-2026-16496, is fixed in terraform-mcp-server 1.1.0.

Affected (CNA)

Vendor / product	Versions
HashiCorp / Tooling	affected 0.3.0 before 1.1.0

CWE

CWE-384

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.