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TI-2026-26516 Aliases CVE-2026-34221GHSA-qpfv-44f3-qqx6

MikroORM has Prototype Pollution in Utils.merge

Priority LOW 36CWE-1321Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
None · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00383 32nd percentileScored 2026-11-07
Fix Fixed mikro-orm (mikro-orm): 6.6.10, 7.0.6@mikro-orm/core (npm): 6.6.10, 7.0.6

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
mikro-ormmikro-ormbefore 6.6.10; 7.0.0-rc.0 to before 7.0.66.6.10, 7.0.6Patch availableCNA
—@mikro-orm/core (npm)before 6.6.106.6.10Patch availableGHSA-qpfv-44f3-qqx6
—@mikro-orm/core (npm)7.0.0-dev.0 to before 7.0.67.0.6Patch availableGHSA-qpfv-44f3-qqx6
  • mikro-orm Vendormikro-orm Affected before 6.6.10; 7.0.0-rc.0 to before 7.0.6 Fixed in 6.6.10, 7.0.6 Patch available CNA
  • @mikro-orm/core (npm) Vendor— Affected before 6.6.10 Fixed in 6.6.10 Patch available GHSA-qpfv-44f3-qqx6
  • @mikro-orm/core (npm) Vendor— Affected 7.0.0-dev.0 to before 7.0.6 Fixed in 7.0.6 Patch available GHSA-qpfv-44f3-qqx6

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mikro-orm:mikroorm:*:*:*:*:*:node.js:*:*before 6.6.10; 7.0.0 to before 7.0.6Vulnerablemikro-orm
  • cpe:2.3:a:mikro-orm:mikroorm:*:*:*:*:*:node.js:*:* Versions before 6.6.10; 7.0.0 to before 7.0.6 Vulnerable ·mikro-orm

Remediation

  • Fix · CNA mikro-orm (mikro-orm) Fixed in 6.6.10, 7.0.6
  • Fix · GHSA-qpfv-44f3-qqx6 @mikro-orm/core (npm) Fixed in 6.6.10 Advisory →
  • Fix · GHSA-qpfv-44f3-qqx6 @mikro-orm/core (npm) Fixed in 7.0.6 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-34221
  2. 2026-10-03 Alias added: GHSA-qpfv-44f3-qqx6

References

Advisory 2

Other 1

  • TI-2026-26515 MikroORM is vulnerable to SQL Injection via specially crafted object CVSS 4.0CRITICAL 9.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences