{"id":"CVE-2026-104848","summary":"Tinypool: Prototype Pollution gadget in worker options leads to Remote Code Execution","details":"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.","aliases":["GHSA-5gmw-xhrv-c9v3"],"modified":"2026-10-04T02:46:03.250253109Z","published":"2026-10-02T16:15:04.101Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104848.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-1321"]},"references":[{"type":"WEB","url":"https://github.com/tinylibs/tinypool/releases/tag/v2.1.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104848.json"},{"type":"ADVISORY","url":"https://github.com/tinylibs/tinypool/security/advisories/GHSA-5gmw-xhrv-c9v3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-104848"},{"type":"FIX","url":"https://github.com/tinylibs/tinypool/commit/24df4e730e7d0857a6d226c9b58f8924227404fd"},{"type":"FIX","url":"https://github.com/tinylibs/tinypool/pull/134"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/tinylibs/tinypool","events":[{"introduced":"0"},{"fixed":"24df4e730e7d0857a6d226c9b58f8924227404fd"},{"fixed":"4b5229a1cf6512989738676a6bcb247879be3298"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"2.1.1"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v2.1.0","v2.0.0","v1.1.1","v1.1.0","v1.0.2","v1.0.1","v1.0.0","v0.9.0","v0.8.4","v0.8.3","v0.8.2","v0.8.1","v0.8.0","v0.7.0","v0.6.0","v0.5.0","v0.4.0","v0.3.1","v0.3.0","v0.2.4","v0.2.3","v0.2.2","v0.2.1","v0.2.0","v0.1.3","v0.1.2","v0.1.1","v0.1.0","v0.0.8","v0.0.7","v0.0.6","v0.0.5","v0.0.4","v0.0.3","v0.0.2","v0.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-104848.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}