CVE-2026-102992

Description

piscina is a node.js worker pool implementation. Prior to 4.9.4, 5.3.2, and 6.0.0-rc.5, Piscina stores ThreadPool.options in src/index.ts as a plain object that inherits from Object.prototype. Applications with a separate prototype-pollution primitive can therefore supply inherited values for security-sensitive options that do not have own defaults. An inherited execArgv value is passed to the Node.js Worker constructor and can preload attacker-controlled code in worker threads, an inherited loadBalancer function can execute during task scheduling, and inherited env values can alter worker environments. This issue is fixed in versions 4.9.4, 5.3.2, and 6.0.0-rc.5.

References

https://github.com/piscinajs/piscina/security/advisories/GHSA-67c8-pqhq-4rmx

https://github.com/piscinajs/piscina/releases/tag/v6.0.0-rc.5

https://github.com/piscinajs/piscina/releases/tag/v5.3.2

https://github.com/piscinajs/piscina/releases/tag/v4.9.4

https://github.com/piscinajs/piscina/commit/bebbda255c2981cecddd36b171b94be2fd41c9a6

https://github.com/piscinajs/piscina/commit/5be7bbb19e3787bb698862cd516121a578d690f7

https://github.com/piscinajs/piscina/commit/2f69f67159a0e48b38fd61fa4a91c2fdc19fff72

https://github.com/piscinajs/piscina/commit/0cb12fca37f526065b072592afe954574dcc656f

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-90364

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4

EPSS