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Vulnerabilities

CVE-2026-34221 | BDVDB-2026-323949 Detail

mikro-ormmikro-orm

Description#

MikroORM is a TypeScript ORM for Node.js based on Data Mapper, Unit of Work and Identity Map patterns. Prior to versions 6.6.10 and 7.0.6, a prototype pollution vulnerability exists in the Utils.merge helper used internally by MikroORM when merging object structures. The function did not prevent special keys such as __proto__, constructor, or prototype, allowing attacker-controlled input to modify the JavaScript object prototype when merged. This issue has been patched in versions 6.6.10 and 7.0.6.

Impact#

Per CVSS v4.0: confidentiality impact none, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

  • CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

References#

Exploit#

No public exploit known

History#

  1. Version 1Record published in the CVE List.