Is CVE-2026-34221 actively exploited?

No active exploitation of CVE-2026-34221 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-34221 be exploited remotely?

Yes. CVE-2026-34221 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-34221?

CVE-2026-34221 has a CVSS score of 9.1 (CRITICAL).

HOME VULNERABILITIESCVE-2026-34221

CRITICAL

CVE-2026-34221

CWE-1321Published: March 31, 2026· Updated: Apr 3, 2026

9.1

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:14.0th

Official 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.

NVD Source

Technical Analysis

CVE-2026-34221 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.1.