sdelements lets-chat

• CVE-2026-66751 Medium 5.4 Let's Chat 0.3.0 - 0.4.8 Improper Authorization via DELETE /rooms/:room 0.3%
• CVE-2026-66750 Medium 4.3 Let's Chat 0.3.0 - 0.4.8 Broken Access Control File Disclosure via GET /files route 0.3%
• CVE-2026-66749 Medium 6.5 Let's Chat 0.4.0 - 0.4.8 Denial of Service via Null Dereference in Room Lookup 0.4%