fix: add SSRF protection to link preview fetching#22
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Block requests to private/reserved IP addresses (loopback, private ranges, link-local, cloud metadata) by resolving the hostname before fetching. Redirect targets are also validated via a custom redirect policy. Covers both IPv4 and IPv6 link-local ranges. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
reqwestredirect policyTest plan
http://127.0.0.1→ blocked (URL displayed as-is)http://localhost→ blockedhttp://192.168.x.x→ blockedhttp://169.254.169.254→ blocked (cloud metadata)https://github.com) → title fetched successfully🤖 Generated with Claude Code