{"id":"EUVD-2026-38320","enisaUuid":"09fead25-c43a-3efd-a0ae-30a5eea52015","description":"piscina is a node.js worker pool implementation. Prior to 6.0.0-rc.2, 5.2.0, and 4.9.3, piscina\u0027s constructor and run() paths read the filename option via plain member access. Both reads fall through the prototype chain when the caller\u0027s options object doesn\u0027t have filename as an own property. When Object.prototype.filename is polluted upstream the inherited value flows to worker_threads.Worker import and the attacker\u0027s .mjs runs in the worker. This vulnerability is fixed in 6.0.0-rc.2, 5.2.0, and 4.9.3.","datePublished":"Jun 22, 2026, 4:50:40 PM","dateUpdated":"Nov 3, 2026, 7:14:08 PM","baseScore":8.1,"baseScoreVersion":"3.1","baseScoreVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","references":"https://github.com/piscinajs/piscina/security/advisories/GHSA-x9g3-xrwr-cwfg\n","aliases":"CVE-2026-55388\nGHSA-x9g3-xrwr-cwfg\n","assigner":"GitHub_M","epss":0.48,"enisaIdProduct":[{"id":"8c2b8f9d-1836-323e-bf7e-361d41830a80","product":{"name":"piscina","vendor":{"name":"piscinajs"}},"product_version":"\u003c 4.9.3"},{"id":"bbd0c7d4-56b5-34ec-ba53-f1600d1e6aba","product":{"name":"piscina","vendor":{"name":"piscinajs"}},"product_version":"6.0.0-rc.1, \u003c 6.0.0-rc.2"},{"id":"cfc70c94-8636-3716-81d7-4aae7093b63a","product":{"name":"piscina","vendor":{"name":"piscinajs"}},"product_version":"5.0.0-alpha.0, \u003c 5.2.0"}],"enisaIdVendor":[{"id":"82d6e019-8188-320e-8649-251c045d84a5","vendor":{"name":"piscinajs"}}],"enisaIdVulnerability":[{"id":"45072c27-3199-3000-b4cd-268a8c165ab2","vulnerability":{"id":"CVE-2026-55388","description":"piscina is a node.js worker pool implementation. Prior to 6.0.0-rc.2, 5.2.0, and 4.9.3, piscina\u0027s constructor and run() paths read the filename option via plain member access. Both reads fall through the prototype chain when the caller\u0027s options object doesn\u0027t have filename as an own property. When Object.prototype.filename is polluted upstream the inherited value flows to worker_threads.Worker import and the attacker\u0027s .mjs runs in the worker. This vulnerability is fixed in 6.0.0-rc.2, 5.2.0, and 4.9.3.","datePublished":"Jun 22, 2026, 4:50:40 PM","dateUpdated":"Nov 3, 2026, 7:14:08 PM","status":"PUBLISHED","baseScore":8.1,"baseScoreVersion":"3.1","baseScoreVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","references":"https://github.com/piscinajs/piscina/security/advisories/GHSA-x9g3-xrwr-cwfg\n","enisa_id":"EUVD-2026-38320\n","assigner":"GitHub_M","epss":0.48,"dataProcessed":"Nov 7, 2026, 7:20:15 AM","vulnerabilityProduct":[{"id":"5cafbde1-5eed-38e1-bcd9-c40cdc6f017e","product":{"name":"piscina","vendor":{"name":"piscinajs"}},"product_version":"6.0.0-rc.1, \u003c 6.0.0-rc.2"},{"id":"d92f768a-7530-3289-9d3f-79d7e83c9b0e","product":{"name":"piscina","vendor":{"name":"piscinajs"}},"product_version":"\u003c 4.9.3"},{"id":"fe1ab56a-61ee-35ee-8e8d-55c69bc2e0bf","product":{"name":"piscina","vendor":{"name":"piscinajs"}},"product_version":"5.0.0-alpha.0, \u003c 5.2.0"}],"vulnerabilityVendor":[{"id":"0ad24468-ab45-336c-904a-23b7c7dbbb20","vendor":{"name":"piscinajs"}}]}},{"id":"7f97724e-06e3-3496-8dbe-3cb69b3a68eb","vulnerability":{"id":"GHSA-x9g3-xrwr-cwfg","description":"piscina: Prototype Pollution Gadget → RCE via inherited options.filename","datePublished":"Jun 18, 2026, 1:05:11 PM","dateUpdated":"Jun 18, 2026, 1:05:11 PM","baseScore":0.0,"references":"https://github.com/piscinajs/piscina/security/advisories/GHSA-x9g3-xrwr-cwfg\nhttps://github.com/piscinajs/piscina\n","enisa_id":"EUVD-2026-38320\n","aliases":"GHSA-x9g3-xrwr-cwfg\nCVE-2026-55388\n","epss":0.0,"dataProcessed":"Nov 1, 2026, 2:01:46 AM","vulnerabilityProduct":[],"vulnerabilityVendor":[]}}],"enisaIdAdvisory":[]}