{"cve":"CVE-2026-104848","nvd":{"published":"2026-10-02T17:17:03.473","modified":"2026-10-02T18:33:20.487","status":"Deferred","description":"Tinypool is a minimal Node.js worker thread pool implementation. Prior to 2.1.1, Tinypool constructs ThreadPool.options from a normal options object and reads the execArgv and env worker options in dist/index.js, allowing values inherited from a polluted Object.prototype to be copied into own properties and passed to worker_threads.Worker. An attacker who can first pollute either property can cause each newly spawned worker to load attacker-selected JavaScript through command-line preload arguments or NODE_OPTIONS, resulting in code execution with the host process's privileges and possible access to CI secrets, signing material, or build artifacts. This issue is fixed in version 2.1.1.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","score":9.5},"cvss_v3":null,"cwes":["CWE-1321"],"references":["https://github.com/tinylibs/tinypool/commit/24df4e730e7d0857a6d226c9b58f8924227404fd","https://github.com/tinylibs/tinypool/pull/134","https://github.com/tinylibs/tinypool/releases/tag/v2.1.1","https://github.com/tinylibs/tinypool/security/advisories/GHSA-5gmw-xhrv-c9v3","https://github.com/tinylibs/tinypool/security/advisories/GHSA-5gmw-xhrv-c9v3"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:57:46.668721662+00:00"},"epss":{"cve":"CVE-2026-104848","score":0.00497,"percentile":0.42343,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-5gmw-xhrv-c9v3","url":"https://osv.dev/vulnerability/GHSA-5gmw-xhrv-c9v3","summary":"Tinypool: Prototype Pollution gadget in worker options leads to Remote Code Execution","modified":"2026-10-05T23:00:04.259458991Z","packages":[{"ecosystem":"npm","name":"tinypool","purl":"pkg:npm/tinypool","ranges":["<2.1.1"],"fixed":["2.1.1"]}]}],"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."]}