Executive Summary

CVE-2026-34220 is a critical SQL injection vulnerability in MikroORM, a TypeScript ORM for Node.js. The flaw occurs when specially crafted objects controlled by an attacker are interpreted as raw SQL query fragments during query construction. This happens when untrusted user input is passed directly to MikroORM's write APIs without proper validation or schema enforcement.

The root cause is the use of duck-typed detection of internal ORM marker properties, which attackers can mimic to inject raw SQL. The vulnerability affects MikroORM versions up to 6.6.9 and 7.x up to 7.0.5 and has been fixed in versions 6.6.10 and 7.0.6 by replacing duck-typed checks with symbol-based markers that cannot be forged.

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Impact Analysis

This vulnerability can allow attackers to inject arbitrary SQL commands into the database queries executed by MikroORM. Depending on the database and the specific queries, this can lead to unauthorized data access, data modification, or even complete compromise of the database.

If your application uses MikroORM versions prior to 6.6.10 or 7.0.6 and does not enforce strict input validation or schema checks, it is vulnerable to this attack. Exploiting this vulnerability could result in data breaches, data loss, or disruption of service.

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Detection Guidance

This vulnerability can be detected by reviewing your usage of MikroORM in your application, specifically looking for instances where untrusted user input is passed directly to MikroORM write APIs such as `wrap(entity).assign(userInput)` followed by `em.flush()`, `em.nativeUpdate()`, `em.nativeInsert()`, or `em.create()` followed by `em.flush()`.

Detection involves auditing your codebase for these patterns and checking the MikroORM version in use to ensure it is not older than 6.6.10 or 7.0.6.

There are no specific network or system commands provided to detect this vulnerability automatically.

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Mitigation Strategies

The immediate mitigation step is to upgrade MikroORM to version 6.6.10 or 7.0.6 or later, where the vulnerability has been patched.

Additionally, enforce strict input validation and schema checks before passing any data to MikroORM write APIs to prevent untrusted input from being interpreted as raw SQL.

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Compliance Impact

The vulnerability is a critical SQL injection flaw that allows attackers to inject arbitrary SQL commands if untrusted user input is passed without validation. This can lead to unauthorized access, modification, or disclosure of sensitive data stored in the database.

Such unauthorized data access or manipulation can result in non-compliance with data protection regulations and standards like GDPR and HIPAA, which require safeguarding personal and sensitive information against breaches.

Therefore, if an application using MikroORM versions prior to the patched releases does not enforce strict input validation or schema checks, it may be at risk of violating these compliance requirements due to potential data breaches caused by this vulnerability.

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