CGI versions before 5.00 for Perl allow Content-Disposition parameter injection via unescaped double quotes in the header attachment filename.

header(-attachment => $name) writes $name into the quoted filename parameter of Content-Disposition without escaping double quotes.

An application that passes request data as the attachment name can be made to send a second filename parameter, changing the name the response is saved under.

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Fixes

Solution

Upgrade to CGI 5.00 or later.


Workaround

No workaround given by the vendor.

History

Wed, 04 Nov 2026 00:00:00 +0000

Type Values Removed Values Added
Description CGI versions before 5.00 for Perl allow Content-Disposition parameter injection via unescaped double quotes in the header attachment filename. header(-attachment => $name) writes $name into the quoted filename parameter of Content-Disposition without escaping double quotes. An application that passes request data as the attachment name can be made to send a second filename parameter, changing the name the response is saved under.
Title CGI versions before 5.00 for Perl allow Content-Disposition parameter injection via unescaped double quotes in the header attachment filename
Weaknesses CWE-116
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: CPANSec

Published:

Updated: 2026-11-03T23:41:05.454Z

Reserved: 2026-11-02T17:45:23.639Z

Link: CVE-2026-120647

cve-icon Vulnrichment

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cve-icon NVD

Status : Received

Published: 2026-11-04T00:17:26.260

Modified: 2026-11-04T00:17:26.260

Link: CVE-2026-120647

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses