CVE-2026-22245

CVE-2026-22245 — Mastodon SSRF protection bypass . The issue affects Mastodon releases prior to 4.5.4, 4.4.11, 4.3.17 and 4.2.29, where the local/loopback access protection for outbound HTTP requests relied on a incomplete disallowed IP ranges list. An attacker could use certain IPs to trigger re...