Is CVE-2026-55388 actively exploited?

No active exploitation of CVE-2026-55388 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-55388 be exploited remotely?

Yes. CVE-2026-55388 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-55388?

CVE-2026-55388 has a CVSS score of 8.1 (HIGH).

HOME VULNERABILITIESCVE-2026-55388

HIGH

CVE-2026-55388

CWE-94Published: June 22, 2026· Updated: Jun 23, 2026

8.1

CVSS v3.1

EPSS:0.30%probability of exploitation in 30 daysPercentile:21.1th

Official Description

piscina is a node.js worker pool implementation. Prior to 6.0.0-rc.2, 5.2.0, and 4.9.3, piscina's constructor and run() paths read the filename option via plain member access. Both reads fall through the prototype chain when the caller's options object doesn't have filename as an own property. When Object.prototype.filename is polluted upstream the inherited value flows to worker_threads.Worker import and the attacker's .mjs runs in the worker. This vulnerability is fixed in 6.0.0-rc.2, 5.2.0, and 4.9.3.

NVD Source

Technical Analysis

CVE-2026-55388 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 complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.1.