CVE-2026-55388 | BDVDB-2026-342145 Detail

Description#

piscina is a node.js worker pool implementation. Prior to 6.0.0-rc.2, 5.2.0, and 4.9.3, piscina's constructor and run() paths read the filename option via plain member access. Both reads fall through the prototype chain when the caller's options object doesn't 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's .mjs runs in the worker. This vulnerability is fixed in 6.0.0-rc.2, 5.2.0, and 4.9.3.

Impact#

Weaknesses#

References#

Exploit#

History#

1. Version 12026-06-22Record published in the CVE List.
2. Version 22026-11-03Most recent update recorded in the CVE List.