alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"VEDAS CVE-2026-90769 Open Notebook - Server-Side Request Forgery"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/api/sources"; nocase; fast_pattern; http.request_body; content:"\"url\""; nocase; pcre:"/\"url\"\s*:\s*\"https?:\/\/(?:169\.254\.169\.254|metadata|127\.0\.0\.1|0\.0\.0\.0|localhost|10\.|192\.168\.|172\.(?:1[6-9]|2[0-9]|3[01])\.)/i"; classtype:web-application-attack; reference:cve,CVE-2026-90769; reference:url,https://www.exploit.observer/?keyword=CVE-2026-90769&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=open-notebook&match=exact; sid:1095000; rev:1;)