CVE-2026-16496

HIGH
MEDIUM Priority: 0.03 BB Relevance: 68/100
Published: 2026-07-28 Modified: 2026-10-23 First seen: 2026-10-29 Status: active

Attack Surface

Network No Auth No Interaction Conf. Impact Integ. Impact Scope Change

CVSS Vector Breakdown

AV: Network
AC: High
PR: None
UI: None
S: Changed
C: High
I: High
A: Low

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.

Weakness Classification (1)

Bug Bounty Relevance

68 / 100
✓ Network accessible
✓ No authentication
✓ No user interaction

CVSS Score

8.9 / 10.0 v3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L

EPSS — Exploitation Probability

0.36%
Raw Score 0.003550
Percentile 29.2%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00355
2026-10-28
0.00355

Intelligence Sources

nvd ref →