{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-120633","assignerOrgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","state":"PUBLISHED","assignerShortName":"CPANSec","dateReserved":"2026-11-02T17:40:07.895Z","datePublished":"2026-11-03T23:40:04.604Z","dateUpdated":"2026-11-03T23:40:04.604Z"},"containers":{"cna":{"affected":[{"collectionURL":"https://cpan.org/modules","defaultStatus":"unaffected","modules":["CGI"],"packageName":"CGI","packageURL":"pkg:cpan/CGI","programFiles":["lib/CGI.pm"],"programRoutines":[{"name":"CGI::url"},{"name":"CGI::self_url"},{"name":"CGI::virtual_host"},{"name":"CGI::virtual_port"}],"repo":"https://github.com/leejo/CGI.pm","versions":[{"lessThan":"5.00","status":"affected","version":"0","versionType":"custom"}]}],"descriptions":[{"lang":"en","value":"CGI versions before 5.00 for Perl trust the client X-Forwarded-Host header in url, self_url, virtual_host and virtual_port.\n\nThese 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=>1) base href, and the default start_form action when REQUEST_URI is not set.\n\nA client can poison shared caches, and URLs the application stores or sends, with redirects, links and scripts that point at a host it controls."}],"problemTypes":[{"descriptions":[{"cweId":"CWE-348","description":"CWE-348 Use of Less Trusted Source","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-601","description":"CWE-601 URL Redirection to Untrusted Site ('Open Redirect')","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","shortName":"CPANSec","dateUpdated":"2026-11-03T23:40:04.604Z"},"references":[{"tags":["technical-description"],"url":"https://metacpan.org/release/LEEJO/CGI-4.72/source/lib/CGI.pm"},{"tags":["release-notes"],"url":"https://metacpan.org/release/LEEJO/CGI-5.00/changes"},{"tags":["patch"],"url":"https://github.com/leejo/CGI.pm/commit/d76752a5e8dfd365b0fe3a0b9a7da6c054e856af.patch"}],"solutions":[{"lang":"en","value":"Upgrade to CGI 5.00 or later."}],"source":{"discovery":"UNKNOWN"},"title":"CGI versions before 5.00 for Perl trust the client X-Forwarded-Host header in url, self_url, virtual_host and virtual_port","workarounds":[{"lang":"en","value":"For deployments that cannot upgrade, strip X-Forwarded-Host at the web server or proxy unless it sets the header itself, and validate Host."}],"x_generator":{"engine":"cpansec-cna-tool 0.1"}}}}