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Kiro CLI update breaks MCP servers over environment variable handling

By PulseAugur Editorial · [1 sources] ·

A recent update to Kiro CLI, version 2.4.0, introduced a change in how environment variables are handled in MCP server configurations. Previously, all environment variables were expanded, but the update now restricts this to only those listed in the 'Approved Environment Variables' setting. This change can cause 401 Unauthorized errors if sensitive variables like API keys are not explicitly added to this approved list in the Kiro CLI settings. AI

IMPACT This change affects developers using Kiro CLI for managing MCP servers, potentially causing authentication issues if not addressed.

RANK_REASON The cluster describes a change in a software tool's functionality that impacts users.

Read on dev.to — MCP tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Kiro CLI update breaks MCP servers over environment variable handling

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The cluster describes a change in a software tool's functionality that impacts users.
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COVERAGE [1]

  1. dev.to — MCP tag TIER_1 English(EN) · Akira Tateishi ·

    When a Kiro CLI Update Silently Breaks Your MCP Servers — The Approved Environment Variables Gotcha

    <blockquote> <p>🇯🇵 Original article (Japanese): <a href="https://qiita.com/akira-greennote/items/6899d45394de0472be39" rel="noopener noreferrer">Kiro CLI アップデートで MCP サーバーが突然動かなくなった話</a></p> </blockquote> <h2> Introduction </h2> <p>One morning, I ran my usual workflow with Kiro CL…

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