Description
CGI versions from 4.71 before 5.00 for Perl allow denial of service via a plain string dereferenced as a symbolic reference in uploadInfo.

uploadInfo dereferences its argument and calls its filename method without checking that it is an upload filehandle. A plain string naming a defined global variable, such as the parameter value from ?upload=0, is treated as a symbolic reference, and the method call on it dies.
Published: 2026-11-03
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Solution

Upgrade to CGI 5.00 or later.

Tracking

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Advisories

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History

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

Type Values Removed Values Added
Weaknesses CWE-1287
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Important


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

Type Values Removed Values Added
Description CGI versions from 4.71 before 5.00 for Perl allow denial of service via a plain string dereferenced as a symbolic reference in uploadInfo. uploadInfo dereferences its argument and calls its filename method without checking that it is an upload filehandle. A plain string naming a defined global variable, such as the parameter value from ?upload=0, is treated as a symbolic reference, and the method call on it dies.
Title CGI versions from 4.71 before 5.00 for Perl allow denial of service via a plain string dereferenced as a symbolic reference in uploadInfo
Weaknesses CWE-843
References

Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: CPANSec

Published:

Updated: 2026-11-03T23:40:59.008Z

Reserved: 2026-11-02T17:45:12.662Z

Link: CVE-2026-120646

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-04T00:17:26.140

Modified: 2026-11-04T00:17:26.140

Link: CVE-2026-120646

cve-icon Redhat

Severity : Important

Publid Date: 2026-11-03T23:40:59Z

Links: CVE-2026-120646 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-11-04T14:15:15Z

Weaknesses
  • CWE-1287

    Improper Validation of Specified Type of Input

  • CWE-843

    Access of Resource Using Incompatible Type ('Type Confusion')