CVE-2026-120637: CGI versions before 5.00 for Perl take request parameters from the process command line arguments for an unrecognised REQUEST_METHOD
Stig Palmquist 03 Nov 2026 23:50 UTC
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CVE-2026-120637 CPAN Security Group
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CVE ID: CVE-2026-120637
Distribution: CGI
Versions: before 5.00
MetaCPAN: https://metacpan.org/dist/CGI
VCS Repo: https://github.com/leejo/CGI.pm
CGI versions before 5.00 for Perl take request parameters from the
process command line arguments for an unrecognised REQUEST_METHOD
Description
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CGI versions before 5.00 for Perl take request parameters from the
process command line arguments for an unrecognised REQUEST_METHOD.
For a REQUEST_METHOD such as OPTIONS, CGI falls through to its offline
debugging mode, which is on by default, and builds the parameters and
path_info from the process's command line arguments.
Problem types
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- CWE-489 Active Debug Code
Solutions
---------
Upgrade to CGI 5.00 or later.
References
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https://metacpan.org/release/LEEJO/CGI-4.72/source/lib/CGI.pm
https://metacpan.org/release/LEEJO/CGI-5.00/changes
https://github.com/leejo/CGI.pm/commit/b753ff75a3bc4554c075cc37c1db605a55297029.patch