get_javadoc_index
on https://www.javadocs.dev/mcp
Severity
2 findings on this tool
- mediumunconstrained inputf-r1-get_javadoc_index
Tool `get_javadoc_index` accepts unconstrained string input
The following string parameter(s) have no `maxLength` constraint: `artifactId`, `groupId`, `version`. 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.
OWASP LLM01NIST MEASURE-2.3ATLAS T0051 - mediumindirect injectionf-r6-get_javadoc_index
Tool `get_javadoc_index` fetches external web content -- indirect-injection surface
Description: "Fetches the rendered Javadoc/Scaladoc index page for a specific Maven Central artifact version, converted to plain text/markdown. Useful for orienting yourself in an unfamiliar library: it lists the top-level packages, modules, and (for Scaladoc) often a curated overview. Use this before drilling into specific symbols. Works against the live Maven Central catalog — you do not need to download the javadoc jar." -- this tool pulls externally-controlled content into the agent's context window, the canonical indirect-injection vector. Even when the user supplies the URL, content at that URL can carry hostile instructions.
fix: Sandbox the fetched content: strip prompts before forwarding to the model, constrain to an allow-list of domains, and route through capframe-guard with a `domain in [...]` caveat.
OWASP LLM01NIST MEASURE-2.3ATLAS T0051
About this tool
get_javadoc_index is one of 8 tools exposed by Javadocs.dev MCP. The server scored 76/100 overall against the capframe rule engine (source: http). Last scanned 2026-06-05.
The findings above are emitted by the public capframe.findings.v1 schema. Disagree with one? Open an issue.