{"slug": "show-hn-aigis-43-of-mcp-servers-have-injection-payloads-i-built-a-firewall", "title": "Show HN: Aigis – 43% of MCP servers have injection payloads; I built a firewall", "summary": "A security researcher found that 43% of MCP servers contain injection payloads, prompting the development of Aigis, a firewall designed to block such threats. The tool aims to protect users from malicious code embedded in widely used server implementations.", "body_md": "Hacker News\nnew\n|\npast\n|\ncomments\n|\nask\n|\nshow\n|\njobs\n|\nsubmit\nlogin\nShow HN: Aigis – 43% of MCP servers have injection payloads; I built a firewall\n1 point\nby\nCharles389no\n20 minutes ago\n|\nhide\n|\npast\n|\nfavorite\n|\ndiscuss\nhelp\nGuidelines\n|\nFAQ\n|\nLists\n|\nAPI\n|\nSecurity\n|\nLegal\n|\nApply to YC\n|\nContact\nSearch:", "url": "https://wpnews.pro/news/show-hn-aigis-43-of-mcp-servers-have-injection-payloads-i-built-a-firewall", "canonical_source": "https://news.ycombinator.com/item?id=48274026", "published_at": "2026-05-26 01:46:32+00:00", "updated_at": "2026-05-26 02:07:48.889650+00:00", "lang": "en", "topics": ["ai-safety", "ai-infrastructure", "ai-tools"], "entities": ["Aigis", "MCP"], "alternates": {"html": "https://wpnews.pro/news/show-hn-aigis-43-of-mcp-servers-have-injection-payloads-i-built-a-firewall", "markdown": "https://wpnews.pro/news/show-hn-aigis-43-of-mcp-servers-have-injection-payloads-i-built-a-firewall.md", "text": "https://wpnews.pro/news/show-hn-aigis-43-of-mcp-servers-have-injection-payloads-i-built-a-firewall.txt", "jsonld": "https://wpnews.pro/news/show-hn-aigis-43-of-mcp-servers-have-injection-payloads-i-built-a-firewall.jsonld"}}