jbz<p>💧 Supabase MCP can leak your entire SQL database</p><p>「 The cursor assistant operates the Supabase database with elevated access via the service_role, which bypasses all row-level security (RLS) protections. At the same time, it reads customer-submitted messages as part of its input. If one of those messages contains carefully crafted instructions, the assistant may interpret them as commands and execute SQL unintentionally 」</p><p><a href="https://simonwillison.net/2025/Jul/6/supabase-mcp-lethal-trifecta/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">simonwillison.net/2025/Jul/6/s</span><span class="invisible">upabase-mcp-lethal-trifecta/</span></a></p><p><a href="https://indieweb.social/tags/supabase" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>supabase</span></a> <a href="https://indieweb.social/tags/databreach" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>databreach</span></a> <a href="https://indieweb.social/tags/mcp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>mcp</span></a> <a href="https://indieweb.social/tags/sql" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sql</span></a></p>