Is there a public exploit for CVE-2026-120633?

No public exploit for CVE-2026-120633 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

— Unscored

CGI versions before 5.00 for Perl trust the client X-Forwarded-Host header in url, selfurl, virtualhost and virtualport.

CVE-2026-120633

CGI versions before 5.00 for Perl trust the client X-Forwarded-Host header in url, selfurl, virtualhost and virtualport. 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 selfurl are the default redirect location and the starthtml(-base=>1) base href, and the default startform action when REQUESTURI 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.

Assessment

CVSS: Not yet scored
Severity: Unscored
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 4 November 2026
Last updated: 4 November 2026
Assigner: CPANSec

At the source

EUVD (ENISA)

References

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Query this programmatically

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curl https://cve.zerocrew.in/api/cve/CVE-2026-120633