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.
Scores
CVSS v3
9.1
EPSS
0.0013
EPSS Percentile
32.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-1321
Status
published
Products (4)
mikro-orm/core
0 - 6.6.10npm
mikro-orm/mikro-orm
< 6.6.10
mikro-orm/mikro-orm
>= 7.0.0-rc.0, < 7.0.6
mikro-orm/mikroorm
< 6.6.10
Published
Mar 31, 2026
Tracked Since
Mar 31, 2026