{"cve":"CVE-2026-102992","nvd":{"published":"2026-09-30T20:17:27.080","modified":"2026-09-30T21:17:06.450","status":"Deferred","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.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":9.2},"cvss_v3":null,"cwes":["CWE-1321"],"references":["https://github.com/piscinajs/piscina/commit/0cb12fca37f526065b072592afe954574dcc656f","https://github.com/piscinajs/piscina/commit/2f69f67159a0e48b38fd61fa4a91c2fdc19fff72","https://github.com/piscinajs/piscina/commit/5be7bbb19e3787bb698862cd516121a578d690f7","https://github.com/piscinajs/piscina/commit/bebbda255c2981cecddd36b171b94be2fd41c9a6","https://github.com/piscinajs/piscina/releases/tag/v4.9.4"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:57:46.668721662+00:00"},"epss":{"cve":"CVE-2026-102992","score":0.00512,"percentile":0.43386,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-67c8-pqhq-4rmx","url":"https://osv.dev/vulnerability/GHSA-67c8-pqhq-4rmx","summary":"piscina: Prototype-pollution gadget in ThreadPool.options allows RCE via execArgv / loadBalancer / env","modified":"2026-10-01T15:15:09.198862052Z","packages":[{"ecosystem":"npm","name":"piscina","purl":"pkg:npm/piscina","ranges":[">=5.0.0 <5.3.2"],"fixed":["5.3.2"]},{"ecosystem":"npm","name":"piscina","purl":"pkg:npm/piscina","ranges":["<4.9.4"],"fixed":["4.9.4"]},{"ecosystem":"npm","name":"piscina","purl":"pkg:npm/piscina","ranges":[">=6.0.0-rc.1 <6.0.0-rc.5"],"fixed":["6.0.0-rc.5"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}