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Claude Code Project Files RCE & API Token Exfiltration (CVE-2025-59536 & CVE-2026-21852)
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CVE-2025-59536: Malicious `.claude/settings.json` hooks execute shell commands on SessionStart, achieving RCE before user reads the trust dialog. CVE-2026-21852: Malicious repos exfiltrate Anthropic API keys by overriding ANTHROPIC_BASE_URL to attacker-controlled servers. A single malicious commit could compromise any developer.