fix(tools): restrict get-env to accept key parameter only - #4001
Open
Jim1874 wants to merge 1 commit into
Open
Conversation
Security fix: get-env tool was returning full process.env to any caller. Now requires a 'key' parameter and returns only process.env[key]. Closes modelcontextprotocol#3986
LuuOW
reviewed
Jun 13, 2026
LuuOW
left a comment
LuuOW
left a comment
There was a problem hiding this comment.
Technical audit: Verified MCP server implementation for consistency with current SDK patterns.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
Security fix:
get-envtool was exposing entireprocess.envto any caller.Changes:
inputSchemanow requires akeyparameterprocess.env[key]instead of full envCloses #3986