v0.2.0 · live
CAPFRAME
§ serverhttpfindings.v2

Ferryhopper MCP

https://mcp.ferryhopper.com/mcp

Score
B90
Findings
5
Tools
6
Last scan
2026-09-03

Severity breakdown

Critical0
High0
Medium5
Low0
Info0

Worst finding

Tool `get_disruptions` accepts unconstrained string input

· get_disruptions

The following string parameter(s) have no `maxLength` constraint: `country`, `tripDate`. Unbounded strings let an attacker stuff arbitrary payloads through the tool, including indirect-injection content.

fix: Add a `maxLength` to each string property, or constrain with an `enum` or `pattern`. Most legitimate tool inputs fit under a few hundred bytes.

All 5 findings

  1. medium
    Tool `get_disruptions` accepts unconstrained string input· get_disruptionsunconstrained input

    The following string parameter(s) have no `maxLength` constraint: `country`, `tripDate`. Unbounded strings let an attacker stuff arbitrary payloads through the tool, including indirect-injection content.

    fix: Add a `maxLength` to each string property, or constrain with an `enum` or `pattern`. Most legitimate tool inputs fit under a few hundred bytes.

  2. medium
    Tool `get_direct_connections_for_ports` accepts unconstrained string input· get_direct_connections_for_portsunconstrained input

    The following string parameter(s) have no `maxLength` constraint: `portLocation`. Unbounded strings let an attacker stuff arbitrary payloads through the tool, including indirect-injection content.

    fix: Add a `maxLength` to each string property, or constrain with an `enum` or `pattern`. Most legitimate tool inputs fit under a few hundred bytes.

  3. medium
    Tool `search_trips` accepts unconstrained string input· search_tripsunconstrained input

    The following string parameter(s) have no `maxLength` constraint: `arrivalLocation`, `date`, `departureLocation`. Unbounded strings let an attacker stuff arbitrary payloads through the tool, including indirect-injection content.

    fix: Add a `maxLength` to each string property, or constrain with an `enum` or `pattern`. Most legitimate tool inputs fit under a few hundred bytes.

  4. medium
    Tool `search_trips_v2` accepts unconstrained string input· search_trips_v2unconstrained input

    The following string parameter(s) have no `maxLength` constraint: `arrivalLocation`, `date`, `departureLocation`, `returnDate`. Unbounded strings let an attacker stuff arbitrary payloads through the tool, including indirect-injection content.

    fix: Add a `maxLength` to each string property, or constrain with an `enum` or `pattern`. Most legitimate tool inputs fit under a few hundred bytes.

  5. medium
    Tool `trip_details` accepts unconstrained string input· trip_detailsunconstrained input

    The following string parameter(s) have no `maxLength` constraint: `tripId`. Unbounded strings let an attacker stuff arbitrary payloads through the tool, including indirect-injection content.

    fix: Add a `maxLength` to each string property, or constrain with an `enum` or `pattern`. Most legitimate tool inputs fit under a few hundred bytes.

How this was scored

Source http live HTTP MCP endpoint, classified against every rule. Findings are emitted by the public capframe.findings.v1 schema. Score = 100 − (10·Critical + 4·High + 2·Medium + 1·Low), clamped to [0, 100].

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