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.
Published: 2026-11-03
Score: 4.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

Vendor Solution

Upgrade to CGI 5.00 or later.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Wed, 04 Nov 2026 12:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-140
References
Metrics threat_severity

None

cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N'}

threat_severity

Moderate


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

Subscriptions

No data.

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

No data.

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

Severity : Moderate

Publid Date: 2026-11-03T23:41:05Z

Links: CVE-2026-120647 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-11-04T08:15:10Z

Weaknesses
  • CWE-116

    Improper Encoding or Escaping of Output

  • CWE-140

    Improper Neutralization of Delimiters