CVE Explorer

CVE-2026-16496

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.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:1fd03a101aae5779640e44f210e2b713a7764de92b6062d5df083b0e45b19a96

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"defaultStatus":"unaffected","platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"],"product":"Tooling","repo":"https://github.com/hashicorp/terraform-mcp-server","vendor":"HashiCorp","versions":[{"lessThan":"1.1.0","status":"affected","version":"0.3.0","versionType":"semver"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:3911a4f202b801d4f875a64b968ec8f5fec1980db2d9fe7ce0f73f717fef0b3c · sha256:500f8f00f471814b… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"baseScore":8.9,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:3911a4f202b801d4f875a64b968ec8f5fec1980db2d9fe7ce0f73f717fef0b3c · sha256:500f8f00f471814b… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-384","description":"CWE-384: Session Fixation","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:3911a4f202b801d4f875a64b968ec8f5fec1980db2d9fe7ce0f73f717fef0b3c · sha256:500f8f00f471814b… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion

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

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:3911a4f202b801d4f875a64b968ec8f5fec1980db2d9fe7ce0f73f717fef0b3c · sha256:500f8f00f471814b… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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