CVE-2026-55160 Authenticated Server-Side Request Forgery (SSRF) via feed URL in Stringer

Stringer is a self-hosted, anti-social RSS reader. Prior to commit 75cb095, an unrestricted Server-Side Request Forgery SSRF vulnerability allows any authenticated user to force the Stringer server to send arbitrary HTTP/HTTPS requests to internal networks, localhost services, and cloud metadata...