{"id":"CVE-2026-104848","revision":"d1665de99f2e444b8ca302926d4363b5","records":[{"revision":"d1665de99f2e444b8ca302926d4363b5","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-104848","aliases":[],"title":"Tinypool: Prototype Pollution gadget in worker options leads to Remote Code Execution","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.","state":0,"publishedAt":"2026-10-02T16:15:04.101+00:00","modifiedAt":"2026-10-02T17:29:40.5+00:00","affected":[{"ecosystem":"Vendor product","name":"tinypool","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"tinylibs\",\n                    \"product\": \"tinypool\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 2.1.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","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,"severity":"CRITICAL"}],"references":["https://github.com/tinylibs/tinypool/security/advisories/GHSA-5gmw-xhrv-c9v3","https://github.com/tinylibs/tinypool/pull/134","https://github.com/tinylibs/tinypool/commit/24df4e730e7d0857a6d226c9b58f8924227404fd","https://github.com/tinylibs/tinypool/releases/tag/v2.1.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-104848","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-104848","identifiers":["CVE-2026-104848"]},"retained":false,"historicalAffected":[]}],"coverage":[]}