Prometheus has Stored XSS via metric names and label values in Prometheus web UI tooltips and metrics explorer
Go github.com/prometheus/prometheus · Upgrade to 3.11.2, 3.5.2 or 0.311.2-0.20260410083055-07c6232d159b (pre-release) by release line · >= 3.0.0, <= 3.5.1; >= 3.6.0, <= 3.11.1; < 0.311.2-0.20260410083055-07c6232d159b · CVE-2026-40179 · GHSA-vffh-x6r8-xx99