[CVE-2026-120633] CGI versions before 5.00 for Perl trust the client X-Forward

CVE-2026-120633 | CVSS: N/A

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=>1) 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.

参考链接:
• https://github.com/leejo/CGI.pm/commit/d76752a5e8dfd365b0fe3a0b9a7da6c054e856af.
• https://metacpan.org/release/LEEJO/CGI-4.72/source/lib/CGI.pm
• https://metacpan.org/release/LEEJO/CGI-5.00/changes

📌 数据来源: NVD 官方

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