CVE-2026-102992piscina: Prototype-pollution gadget in ThreadPool.options allows RCE via execArgv / loadBalancer / env
Updated under an hour ago ()
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It affects piscinajs piscina. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.43%, higher than 36% of scored CVEs.
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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
- 9.2 CRITICAL (v4.0, CNA)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
- Weakness (CWE)
- CWE-1321
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.43% (percentile 36)
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Sep 30, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
piscinajs piscina piscinajs:piscina (from the name) | before 4.9.4; from 5.0.0, < 5.3.2; from 6.0.0-rc.1, < 6.0.0-rc.5 | CNA record |
References
- https://github.com/piscinajs/piscina/security/advisories/GHSA-67c8-pqhq-4rmxx-refsource-confirm
- https://github.com/piscinajs/piscina/commit/0cb12fca37f526065b072592afe954574dcc656fx-refsource-misc
- https://github.com/piscinajs/piscina/commit/2f69f67159a0e48b38fd61fa4a91c2fdc19fff72x-refsource-misc
- https://github.com/piscinajs/piscina/commit/5be7bbb19e3787bb698862cd516121a578d690f7x-refsource-misc
- https://github.com/piscinajs/piscina/commit/bebbda255c2981cecddd36b171b94be2fd41c9a6x-refsource-misc
- https://github.com/piscinajs/piscina/releases/tag/v4.9.4x-refsource-misc
- https://github.com/piscinajs/piscina/releases/tag/v5.3.2x-refsource-misc
- https://github.com/piscinajs/piscina/releases/tag/v6.0.0-rc.5x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.