patch-tuesday-mcp@0.9.1
VERIFIED· not startedPublisher claims: "MCP server for Microsoft Patch Tuesday security updates (MSRC Security Update Guide)" Observed in sandbox: no network, touches nothing outside the project, writes no memory.
Coverage
Not started: dependency install failed; the server itself was not observed.- Tested
- the dependency install step · every file read, file written and host contacted by what ran
- Not tested
- server startup · the tool list · tool behavior
What this means for the label: Verified here covers what ran. The server's tools were not exercised with a real credential, so nothing about their behavior is asserted; the credential summary below says what to do with that.
Before you give it your token
- It will ask for
APPLICATIONINSIGHTS_CONNECTION_STRINGConfiguration, not credentials: MCP_CORS_ORIGINS, MCP_ENRICHMENT_MAX_RESPONSE_BYTES, MCP_HOST, MCP_KNOWN_ISSUES_MAX_RESPONSE_BYTES, MCP_LIMIT_CONCURRENCY, MCP_LOG_LEVEL, MCP_MAX_BODY_BYTES, MCP_MSRC_MAX_RESPONSE_BYTES, MCP_PORT, MCP_TIMEOUT_KEEP_ALIVE, MCP_TRANSPORT, MCP_TRUSTED_PROXIES, MSRC_PROFILES_PATH, RATE_LIMIT_RPM- Where it talks to
- no vendor host named in the codeAlso microsoft.com, first.org, cisa.gov, nist.gov — not the publisher's domain; check what for before connecting.
- What the honeypot saw
- no credential files read · no network
- What we could not test
- server startup · the tool list · tool behavior
Connect it with a scoped credential, under the guard, and read the third-party hosts first. The code names microsoft.com, first.org, cisa.gov, nist.gov as well as its own vendor. The guard injects APPLICATIONINSIGHTS_CONNECTION_STRING only into requests to the host you bind (and its subdomains) and refuses the rest.
Never paste a credential into a chat, a ticket or a report, including ours. How the guard holds it.
Is [email protected] safe to install?
KillerSkills ran it in the KillerSkills honeypot sandbox (2 scenarios; not started: dependency install failed; the server itself was not observed) on 2026-11-14 and scored it 86/100 (Verified). In what ran, nothing we could detect went wrong: no undeclared network egress, no credential reads, no persistent instruction writes. What it does with a real credential was not observed; the static findings and the publisher carry the rest of the score. Summary: no network, touches nothing outside the project, writes no memory.
Behavior trace
Honeypot run · 0 s · 2 scenarios · 0 deviationsStatic findings
assert "" not in itemFix: Keep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.<summary>Deleting from Recycle Bin displays an internal file name</summary> <p><strong>Symptoms</strong></p> <p>After you install this update, the confirmation Fix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.- format / markdown / csv / columns: (only when format="markdown" orFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.<p>​​​​​​​A resolution is in progress and will be included in a future Windows update. More information will be shared when it becomes available.</p>Fix: Put hosts, commands and strings in plain source. Decoding at runtime looks identical to malware and costs points on its own.completed = subprocess.run(cmd, capture_output=True, text=True, timeout=180)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.<p>​​​​​​​<b class="ocpLegacyBold">Workaround</b></p>Fix: Put hosts, commands and strings in plain source. Decoding at runtime looks identical to malware and costs points on its own.<summary>Microsoft Office applications might fail to open from certain third-party apps</summary> <p><strong>Symptoms</strong></p> <p>Microsoft has received repFix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.assert "" not in result["summary"]Fix: Keep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.Cost to the agent
Tokens estimated at four characters each. The tool list is re-read by the agent on every turn, so it is the number to compare between servers that do the same job: ranked across the index.
Known vulnerabilities
No advisories in OSV for patch-tuesday-mcp@0.9.1 as of 2 h ago. This is the package itself, not its dependencies.