Common Weakness Enumeration

CWE-1109

Weakness Prohibited

Use of Same Variable for Multiple Purposes

Abstraction: Base · Status: Incomplete

API response cwe.mitre.org

The code contains a callable, block, or other code element in which the same variable is used to control more than one unique task or store more than one instance of data.

Mapping guidance

This entry is primarily a quality issue with no direct security implications.

Look for weaknesses that are focused specifically on insecure behaviors that have more direct security implications.

Relationships and members
ChildOf: CWE-1078 · View CWE-1000
Modes of introduction
Implementation
Content history
Submission: CWE Content Team · MITRE · 2018-07-02 · CWE 3.2

Entry derived from Common Quality Enumeration (CQE) Draft 0.9.

Modification: CWE Content Team · MITRE · 2020-02-24 · CWE 4.0

updated Relationships

Modification: CWE Content Team · MITRE · 2023-01-31 · CWE 4.10

updated Description

Modification: CWE Content Team · MITRE · 2023-04-27 · CWE 4.11

updated Relationships

Modification: CWE Content Team · MITRE · 2023-06-29 · CWE 4.12

updated Mapping_Notes

Modification: CWE Content Team · MITRE · 2024-02-29 · CWE 4.14

updated Mapping_Notes

Modification: CWE Content Team · MITRE · 2025-12-11 · CWE 4.19

updated Applicable_Platforms, Common_Consequences, Description, Observed_Examples, Time_of_Introduction

Modification: CWE Content Team · MITRE · 2026-10-28 · CWE 5.0

updated Applicable_Platforms, References, Relationships, Taxonomy_Mappings

0 vulnerabilities reference this CWE, most recent first.

No vulnerabilities reference this CWE.

No mitigation information available for this CWE.

No CAPEC attack patterns related to this CWE.

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