{"id":"CVE-2026-16496","summary":"terraform-mcp-server vulnerable to cross-user credential inheritance if an MCP session ID is obtained by another user","details":"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.","aliases":["BIT-consul-2026-16496"],"modified":"2026-08-17T08:11:07.530389271Z","published":"2026-07-28T17:57:36.795Z","database_specific":{"cna_assigner":"HashiCorp","cwe_ids":["CWE-384"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/16xxx/CVE-2026-16496.json"},"references":[{"type":"WEB","url":"https://discuss.hashicorp.com/t/hcsec-2026-23-multiple-vulnerabilities-impacting-hashicorp-terraform-mcp-server/77606"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/16xxx/CVE-2026-16496.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-16496"},{"type":"PACKAGE","url":"https://github.com/hashicorp/terraform-mcp-server"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/hashicorp/terraform-mcp-server","events":[{"introduced":"22ae2e9368890031a68816c9fb1db91afaeb078c"},{"fixed":"0a0dee37613f40a58c1a16392ee90baa117fdfcd"}],"database_specific":{"extracted_events":[{"introduced":"0.3.0"},{"fixed":"1.1.0"}],"source":"AFFECTED_FIELD"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-16496.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L"}]}