Base weakness

Incomplete

CWE-1024: Comparison of Incompatible Types

The product performs a comparison between two entities, but the entities are of different, incompatible types that cannot be guaranteed to provide correct results when they are directly compared.

Last updated May 1, 2026

2

Recorded CVEs

With this primary weakness

0

KEVs

In the CISA KEV catalog

Not rated

Likelihood of exploit

Per MITRE

Base

Abstraction

MITRE classification

Overview

CWE-1024 (Comparison of Incompatible Types) is a base-level software weakness catalogued by MITRE in the Common Weakness Enumeration (CWE). It describes a recurring type of mistake that can lead to exploitable security vulnerabilities.

Real-world CVEs

2 recorded CVEs are caused by CWE-1024 (Comparison of Incompatible Types). The highest-severity and most recent are shown first.

Common consequences

What can happen when CWE-1024 is exploited.

Varies by Context

Affects: Other

How it happens

When it is introduced

Typically introduced during these phases of the software lifecycle.

Implementation

Applies to

Languages

JavaScript

PHP

How to detect it

Automated Static Analysis

Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.)

Manual Static Analysis

Thoroughly test the comparison scheme before deploying code into production. Perform positive testing as well as negative testing.

Frequently asked questions

Common questions about CWE-1024.

What is CWE-1024?

The product performs a comparison between two entities, but the entities are of different, incompatible types that cannot be guaranteed to provide correct results when they are directly compared.

What CVEs are caused by CWE-1024?

2 recorded CVEs are attributed to CWE-1024, including CVE-2020-13559, CVE-2019-16572.

How is CWE-1024 detected?

Automated Static Analysis: Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.)

What are the consequences of CWE-1024?

Exploiting CWE-1024 can lead to: Varies by Context.

Is CWE-1024 actively exploited?

2 recorded CVEs are caused by CWE-1024; none are currently in CISA's KEV catalog of actively exploited flaws.

References

Weakness data is sourced from the MITRE CWE catalog (v4.20). CVE associations are aggregated and kept current by RadicalNotion.AI.

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Applies to

Overview

Real-world CVEs

Common consequences

How it happens

When it is introduced

Applies to

How to detect it

Automated Static Analysis

Manual Static Analysis

Related weaknesses

Parent

Frequently asked questions

What is CWE-1024?

What CVEs are caused by CWE-1024?

How is CWE-1024 detected?

What are the consequences of CWE-1024?

Is CWE-1024 actively exploited?

References

Stay ahead of CWE-1024