{"id":"CVE-2026-57207","kind":"vulnerability","aliases":["CVE-2026-57207"],"related":[],"title":"NetBox MCP Server: HTTP endpoint lacks authentication, exposing all NetBox tools","description":"NetBox MCP Server is a simple read-only Model Context Protocol server for NetBox. Prior to version 1.2.1, when running with TRANSPORT=http, the MCP server has no authentication on the HTTP endpoint. Any client that can reach the port gets a valid MCP session and full access to all four NetBox tools - no token or credential needed. This issue has been patched in version 1.2.1.","summary":"NetBox MCP Server, a read-only Model Context Protocol server for NetBox, has no authentication on its HTTP transport before version 1.2.1. Anyone who can reach the port gets a valid MCP session and can use all four NetBox tools, reading NetBox data without a token.","severity":"medium","cvss":5.9,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["ai-tooling","mcp","netbox","python","self-hosted"],"not_affected_if":["patched-1.2.1","port-not-reachable","stdio-transport"],"how_to_check":"- Run `grep TRANSPORT` in the server's environment or config and look for `TRANSPORT=http`\n- Check the installed netbox-mcp-server version and see whether it is below `1.2.1`\n- Check whether the MCP port is reachable from networks beyond the intended clients","fix":"- Upgrade the NetBox MCP Server to `1.2.1` or later\n- Until upgraded, restrict the MCP HTTP port with a firewall or bind it to localhost, or use a different transport","status":"open","published_at":"2026-10-23T14:17:56+00:00","first_seen_at":"2026-10-23T21:57:34+00:00","triaged_at":"2026-10-25T04:07:57+00:00","updated_at":"2026-10-25T04:07:57+00:00","category":"ai-tooling","confidence":0.8,"triage":{"at":"2026-10-25T04:07:57Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade the NetBox MCP Server to `1.2.1` or later\n- Until upgraded, restrict the MCP HTTP port with a firewall or bind it to localhost, or use a different transport","reach":"network","title":"NetBox MCP Server: HTTP endpoint lacks authentication, exposing all NetBox tools","impact":"medium","summary":"NetBox MCP Server, a read-only Model Context Protocol server for NetBox, has no authentication on its HTTP transport before version 1.2.1. Anyone who can reach the port gets a valid MCP session and can use all four NetBox tools, reading NetBox data without a token.","category":"ai-tooling","nicknames":[],"who_cares":["netbox","mcp","self-hosted","python"],"confidence":0.8,"needs_auth":"no","worst_case":"Attacker reads all NetBox data through the four exposed tools","analyst_note":"","how_to_check":"- Run `grep TRANSPORT` in the server's environment or config and look for `TRANSPORT=http`\n- Check the installed netbox-mcp-server version and see whether it is below `1.2.1`\n- Check whether the MCP port is reachable from networks beyond the intended clients","needs_analyst":false,"not_affected_if":["stdio-transport","patched-1.2.1","port-not-reachable"],"who_is_affected":"Teams running NetBox MCP Server with the HTTP transport on a version before 1.2.1 are exposed, especially where the port is reachable beyond the intended AI clients. Deployments using the stdio transport or running only on a locked-down local host are less exposed. The sources do not say how many deployments are reachable from the internet.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.000643,"input_tokens":3342,"output_tokens":617,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':13A,16A '-57207':14A,17A '1.2.1':49B,92C,140C 'access':122C 'ai':19B 'ai-tool':18B 'anyon':50B 'authent':7A,42B,103C 'client':109C 'context':35B,84C 'credenti':131C 'cve':12A,15A 'data':70B 'endpoint':5A,107C 'expos':8A 'four':65B,125C 'full':121C 'get':56B,115C 'host':26B 'http':4A,45B,97C,106C 'issu':134C 'lack':6A 'mcp':2A,21B,28B,59B,75C,99C,118C 'model':34B,83C 'need':132C 'netbox':1A,10A,22B,27B,39B,66B,69B,74C,88C,126C 'patch':137C 'port':55B,114C 'prior':89C 'protocol':36B,85C 'python':23B 'reach':53B,112C 'read':32B,68B,81C 'read-on':31B,80C 'run':94C 'self':25B 'self-host':24B 'server':3A,29B,37B,76C,86C,100C 'session':60B,119C 'simpl':79C 'token':73B,129C 'tool':11A,20B,67B,127C 'transport':46B,96C 'use':63B 'valid':58B,117C 'version':48B,91C,139C 'without':71B","nicknames":[],"mitigations":[],"who_affected":"Teams running NetBox MCP Server with the HTTP transport on a version before 1.2.1 are exposed, especially where the port is reachable beyond the intended AI clients. Deployments using the stdio transport or running only on a locked-down local host are less exposed. The sources do not say how many deployments are reachable from the internet.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-23T14:17:56+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","cvss_by":"security-advisories@github.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-57207","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-57207","severity":null,"published_at":"2026-10-23T14:17:56+00:00","modified_at":"2026-10-23T19:57:42+00:00","first_seen_at":"2026-10-23T21:57:34+00:00","fetched_at":"2026-10-23T22:29:03+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}