CVE-2026-33010

mcp-memory-service is an open-source memory backend for multi-agent systems. Prior to version 10.25.1, when the HTTP server is enabled (MCPHTTPENABLED=true), the application configures FastAPI's CORSMiddleware with alloworigins=[''], allowcredentials=True, allowmethods=[""], and allowheaders=[""]. The wildcard Access-Control-Allow-Origin:  header permits any website to read API responses cross-origin. When combined with anonymous access (MCPALLOWANONYMOUS_ACCESS=true) - the simplest way to get the HTTP dashboard working without OAuth - no credentials are needed, so any malicious website can silently read, modify, and delete all stored memories. This issue has been patched in version 10.25.1.