CVE-2026-16496: CWE-384: Session Fixation in HashiCorp Tooling
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.
CVE-2026-16496: CWE-384: Session Fixation in HashiCorp Tooling
Description
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.
CVSS v3.1
Score 8.9high
Affected software
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Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- HashiCorp
- Date Reserved
- 2026-07-21T16:53:07.388Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a68f3749c2644c7f803d819
Added to database: 07/28/2026, 18:22:44 UTC
Last updated: 07/29/2026, 00:21:14 UTC
Views: 4
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