Detections
Analytics

SCA: security update for piscina (GHSA-x9g3-xrwr-cwfg)

high Tenable Cloud Security Plugin ID 443862

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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.
 (CVE-2026-55388)

Solution

Update the piscina library and its related packages to version 4.9.3 or later.

See Also

https://github.com/advisories/GHSA-x9g3-xrwr-cwfg

Plugin Details

Severity: High

ID: 443862

Version: Revision 1.3

Type: Local

Family: SCA Checks

Published: 6/24/2026

Updated: 7/6/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.96

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 5.6

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-55388

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/18/2026

Vulnerability Publication Date: 6/18/2026

Reference Information

CVE: CVE-2026-55388