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.

Project Subscriptions

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4637-1 libconfig-inifiles-perl security update
Debian DSA Debian DSA DSA-6354-1 libconfig-inifiles-perl security update
Fixes

Solution

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.


Workaround

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.

History

Mon, 15 Jun 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 8.6, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 15 Jun 2026 00:30:00 +0000

Type Values Removed Values Added
References

Sun, 14 Jun 2026 12:00:00 +0000

Type Values Removed Values Added
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.
Title 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
Weaknesses CWE-73
CWE-78
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: CPANSec

Published:

Updated: 2026-06-19T20:31:36.704Z

Reserved: 2026-06-07T19:33:54.590Z

Link: CVE-2026-11527

cve-icon Vulnrichment

Updated: 2026-06-19T20:31:36.704Z

cve-icon NVD

Status : Deferred

Published: 2026-06-14T12:16:23.357

Modified: 2026-06-16T15:41:12.897

Link: CVE-2026-11527

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-17T23:30:04Z

Weaknesses