CVE-2026-120641 Details
Description
CGI versions before 5.00 for Perl return upload filenames with any client-supplied path, including ../ and Windows paths. The name returned for an uploaded file is the filename parameter of the part's Content-Disposition header, unchanged. An application that saves the upload under this name can be made to write outside the intended directory.
A path traversal vulnerability has been identified in CGI.pm versions prior to 5.00. When files are uploaded, the module returns the filenames exactly as they are provided by the client, including any paths. This behavior can be exploited to write files outside the intended directory. The vulnerability arises because the filename parameter in the Content-Disposition header is not sanitized, allowing for the inclusion of directory traversal sequences or full Windows paths.
Users can upgrade to CGI.pm version 5.00 or later, where this vulnerability has been addressed. Instructions for updating can be found on the Metacpan CGI.pm release page.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Nov 4, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/leejo/CGI.pm/commit/5379eb18e87b7f985613f5c4f7bae94478a4fa2f.patch | CPANSec | Source CodeVendor |
| https://metacpan.org/release/LEEJO/CGI-4.72/source/lib/CGI.pm | CPANSec | Source CodeVendor |
| https://metacpan.org/release/LEEJO/CGI-5.00/changes | CPANSec | AdvisoryBundleVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-22 | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | CPANSec |
Affected Products
| Product | Versions |
|---|---|
| CGI | < 5.00 |
CPE
Remediation
| |
Change History
1 change record found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 4, 2026 | New CVE Received | CPANSec |