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.

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CVSS v3.1

8.9 HIGH

EPSS

0.37%

probability of exploitation in 30 days

CISA KEV

Not listed

no confirmed exploitation reported

News coverage

sources referencing this CVE

EPSS Trend

Aug 16, 2026 → Aug 26, 2026

▲ 0.10pp

0.27% → 0.37% over 2 tracked changes

CVSS v3.1 Detail

Attack VectorNETWORK

Attack ComplexityHIGH

Privileges RequiredNONE

User InteractionNONE

ScopeCHANGED

ConfidentialityHIGH

IntegrityHIGH

AvailabilityLOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L

Connections

1 relationships

CWE-384

source

Timeline

disclosure → media coverage

Jul 28, 2026

Disclosure — published as a CVE record.