{"id":"DEBIAN-CVE-2026-120633","details":"CGI versions before 5.00 for Perl trust the client X-Forwarded-Host header in url, self_url, virtual_host and virtual_port.  These take the host name and port from the X-Forwarded-Host request header when present, and otherwise from Host, without validating either. The URLs from url and self_url are the default redirect location and the start_html(-base=\u003e1) base href, and the default start_form action when REQUEST_URI is not set.  A client can poison shared caches, and URLs the application stores or sends, with redirects, links and scripts that point at a host it controls.","modified":"2026-11-04T08:00:10.243994754Z","published":"2026-11-04T00:17:24.450Z","upstream":["CVE-2026-120633"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-120633"}],"affected":[{"package":{"name":"libcgi-pm-perl","ecosystem":"Debian:12","purl":"pkg:deb/debian/libcgi-pm-perl?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.55-1","4.57-1","4.59-1","4.60-1","4.61-1","4.62-1","4.63-1","4.64-1","4.65-1","4.66-1","4.67-1","4.68-1","4.70-1","4.71-1","4.72-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-120633.json"}},{"package":{"name":"libcgi-pm-perl","ecosystem":"Debian:13","purl":"pkg:deb/debian/libcgi-pm-perl?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.68-1","4.70-1","4.71-1","4.72-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-120633.json"}},{"package":{"name":"libcgi-pm-perl","ecosystem":"Debian:14","purl":"pkg:deb/debian/libcgi-pm-perl?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.68-1","4.70-1","4.71-1","4.72-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-120633.json"}}],"schema_version":"1.9.2"}