========================================================================
CVE-2026-11527                                       CPAN Security Group
========================================================================

        CVE ID:  CVE-2026-11527
  Distribution:  Config-IniFiles
      Versions:  before 3.001000

      MetaCPAN:  https://metacpan.org/dist/Config-IniFiles
      VCS Repo:  https://github.com/shlomif/perl-Config-IniFiles

Config::IniFiles versions before 3.001000 for Perl allow OS command
injection and file overwrite via a 2-arg open() of the -file argument
in _make_filehandle

Description
-----------
Config::IniFiles versions before 3.001000 for Perl allow OS command
injection and file overwrite via a 2-arg open() of the -file argument
in _make_filehandle.

Config::IniFiles::_make_filehandle opens a filename argument with
Perl's 2-arg open(), so a filename that begins or ends with a pipe ("|
cmd", "cmd |") or begins with a redirect ("> path", ">> path") is run
as a command or redirect rather than opened as a file. The helper is
the open path behind the documented -file argument: new(-file =>
$thing) reaches it through ReadConfig. An in-memory scalar reference
(-file => \$text) does not open a path and is unaffected.

Any caller that forwards untrusted input to the -file argument can run
an arbitrary command or truncate a file under the process UID.

Problem types
-------------
- CWE-78 Improper Neutralization of Special Elements used in an OS
  Command ('OS Command Injection')
- CWE-73 External Control of File Name or Path

Workarounds
-----------
For deployments that cannot upgrade to 3.001000, do not pass untrusted
input as the -file argument. Callers can open the file themselves and
pass the resulting filehandle, or pass the configuration as an
in-memory scalar reference, which bypasses the affected string path.

Solutions
---------
Upgrade to Config::IniFiles 3.001000 or later, which opens the -file
argument with a 3-arg read open so the filename is never interpreted as
a command or redirect.

References
----------
https://github.com/shlomif/perl-Config-IniFiles/commit/3e48f9627fbba4dae5de35be1f735cdeb7e47fb8.patch
https://metacpan.org/release/SHLOMIF/Config-IniFiles-3.001000/changes

--
Paul Johnson - xxxxxx@pjcj.net