CVE-2026-16498 terraform-mcp-server vulnerable to cross-tenant credential reuse in streamable-HTTP stateless mode
Attackers can reuse another user's Terraform token to execute tool calls in stateless HTTP mode, leading to unauthorized access and privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-16498?
CVE-2026-16498 is a critical authentication bypass vulnerability in HashiCorp Tooling, published on 28 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The terraform-mcp-server before version 1.1.0 is vulnerable to a cross-tenant credential reuse issue in the streamable-HTTP stateless transport mode that may allow one user's Terraform token to be used to execute tool calls on behalf of subsequent users. This vulnerability, CVE-2026-16498, is fixed in terraform-mcp-server 1.1.0.
Weakness: CWE-488
Which versions are affected by CVE-2026-16498?
1 open source package ship an affected version, including consul.
| Package | Affected | Fixed in |
|---|---|---|
consul Bitnami | From 0.3.0 | 1.1.0 |
How do I fix CVE-2026-16498?
Upgrade consul to 1.1.0 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-16498 being exploited?
There is no known exploitation of CVE-2026-16498 in the wild and no public exploit code.
Sources
Also known as BIT-consul-2026-16498, GHSA-vq72-755f-9mrm.