BIT-FLUENTD-2026-44161 Fluentd: Server-Side Request Forgery (SSRF) via Placeholder Expansion in `out_http`

Fluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS, SaaS, Hadoop and so on. Prior to 1.19.3, the Fluentd outhttp output plugin allows placeholders such as $tag in the endpoint configuration parameter, and if a placeholder value is derived from untrusted...