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CVE-2026-120646                                      CPAN Security Group
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        CVE ID:  CVE-2026-120646

  Distribution:  CGI
      Versions:  from 4.71 before 5.00
      MetaCPAN:  https://metacpan.org/dist/CGI
      VCS Repo:  https://github.com/leejo/CGI.pm

CGI versions from 4.71 before 5.00 for Perl allow denial of service via
a plain string dereferenced as a symbolic reference in uploadInfo

Description
-----------
CGI versions from 4.71 before 5.00 for Perl allow denial of service via
a plain string dereferenced as a symbolic reference in uploadInfo.

uploadInfo dereferences its argument and calls its filename method
without checking that it is an upload filehandle. A plain string naming
a defined global variable, such as the parameter value from ?upload=0,
is treated as a symbolic reference, and the method call on it dies.

Problem types
-------------
- CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')

Solutions
---------
Upgrade to CGI 5.00 or later.

References
----------
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/a14a7decfdc18f2daf436d30df9b543e3f0f8da3.patch