Mittel 4.8Linux-Server
CVE-2026-125109
rack: Rack: Security bypass and URL manipulation via invalid HTTP host headers
rack
## Summary `Rack::Request#host_with_port`, and therefore `#base_url` and `#url`, return the raw authority string when it fails validation. An attacker-controlled `Host`, `X-Forwarded-Host`, or `Forwarded: host=` value containing characters that are not permitted in an authority is embedded verbatim in URLs generated by the application. This completes the fix for CVE-2026-34835 (GHSA-g2pf-xv49-m2h5), which made `#host` and `#hostname` return `nil` for an invalid authority but…
9. Nov 2026
Original bei Red Hat öffnen