AI Coding Agents Are Leaking Credentials: Cursor, Claude Code, Copilot, and MCP

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TL;DR The hidden trail: Cursor, Claude Code, and GitHub Copilot store credentials across config files, env variables, logs, shell history, and temp files that repository and CI scanners never inspect. The evidence: GitGuardian's State of Secrets Sprawl 2026 found 24,008 unique secrets in public MCP configuration files, 2,117 of them valid, plus a 3.2% leak rate in Claude Code-assisted commits. The fix: GitGuardian Developer Endpoint Protection discovers this trail fleet-wide with local agent inventory, machine scanning, AI hooks, and honeytokens, so security teams can remediate before compromi

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