Unpatched federal endpoints
The Model Context Protocol (MCP), the plumbing that lets AI agents call external tools and data sources, has reached the point where its security problems are showing up in government systems. Five US federal MCP servers remain unpatched six weeks after private disclosure: servers tied to VA benefits, CMS Blue Button, regulations.gov, USASpending, and CDC PLACES 2. The most serious reported issue involves the VA server, which is said to be logging unredacted veteran Social Security numbers and birthdates 2.
That detail moves the conversation from abstract risk to concrete exposure. An MCP server that writes sensitive identifiers to logs creates a store of regulated personal data that can outlive the request that produced it. When remediation stalls for six weeks after disclosure, the gap becomes a governance question as much as a technical one.
Community tooling fills the vacuum
The response so far has come largely from outside government. Alongside an unspecified Google patch, researcher Syed Anas Mohiuddin released mcp-safeguard, an open-source static-analysis tool with 148 rules covering prompt injection, credential exposure, server-side request forgery (SSRF), and tool poisoning 2. He has also filed an IETF Internet-Draft that names "Protocol Pivoting" as a class of cross-protocol lateral movement spanning MCP, Google's Agent-to-Agent (A2A) protocol, and the Agent Network Protocol 2.
The draft points to a risk that goes beyond MCP alone. Organizations are wiring agents together through several protocols at once, so a compromise in one channel can become a route into another. Defining that behavior in a standards venue gives defenders shared vocabulary, though an Internet-Draft is a proposal, not a ratified standard. The gap this reveals is that open-source agent frameworks are moving faster than the governance tooling needed to secure government-facing deployments 2.
Is the protocol the problem?
A separate assessment aimed at enterprise and government-adjacent programs argues that the protocol itself is not at fault. In that view, the security concerns raised against MCP come from failures in the public third-party server ecosystem, and teams that build and operate their own servers do not inherit those risks 1.
The two perspectives partly agree and partly diverge. Both place the danger in implementation rather than in the specification. But the federal servers described in the disclosure appear to be precisely the kind of purpose-built, government-facing deployments that the self-hosting argument would expect to be safer 2. If agency-operated servers can still leak SSNs, then self-hosting removes supply-chain risk from unvetted public servers without guaranteeing safe code. Ownership changes who is accountable. It does not by itself produce secure handling of data.
The compliance layer nobody is checking
The enterprise assessment also identifies an area the security research community has largely ignored: federal compliance obligations 1. It points to Executive Order 14028, CISA guidance, software bill of materials (SBOM) requirements, Secure Software Development Framework (SSDF) attestation under current agency policy, and source code inventory duties 1. It notes that OMB M-16-21, the federal source code policy, has not been rescinded. Contractors building MCP servers under federal contracts are bound by it whether or not a program officer raises the issue, including obligations around government data rights in contract-developed code 1.
This is the most useful counterweight to the patch-focused coverage. Scanners such as mcp-safeguard can catch injection paths and leaked credentials in code. They do not produce SSDF attestations, confirm that an SBOM accounts for every MCP dependency, or check whether data-rights clauses cover agent tooling. Federal programs need both kinds of assurance, and at present they are developing on separate tracks.
What it adds up to
The likely outcome is that federal MCP security will be patched together for some time. Researchers will release scanners and draft standards, vendors will issue fixes, and agencies will remediate at the pace of their own procurement and operations cycles. No dedicated control baseline for agent-tool servers appears in either account. Until one exists, disclosure-driven patching and general software-supply-chain rules are the main defenses.
For teams building MCP servers in or near government, the practical takeaway is to treat these servers as regulated software from the start. Run static analysis, keep sensitive fields out of logs, inventory the code, and document it to the standards that EO 14028 and M-16-21 already require 12. The unpatched VA server shows the cost of waiting for a framework to arrive first.
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