Description
n8n before 2.41.4 and 2.42.x before 2.42.1 contains a prototype pollution vulnerability that allows low-privileged users to alter built-in object behaviour by saving workflows with specially named connection keys. Attackers can add keys such as __proto__ to workflow connections, which the periodic history compaction task processes, causing logins and writes to fail with server errors.
Related CPE's
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References
CVSS impact metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
7.1 · High
Information
Source identifier
Vulnerability status
Deferred
Published
2026-10-28T19:17:33.957Z
2 hours agoLast modified
2026-10-28T19:17:34.077Z
2 hours ago