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CVE PROGRAM SOURCE RECORD7.1 High

CVE-2026-118678

n8n before 2.41.4 and 2.42.1 Prototype Pollution DoS via Workflow History Compaction

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Status
Published
Published
Updated
Assigning organization
VulnCheck

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

n8n-io n8n

Default version status: unaffected

  • 0 to < 2.41.4affected
  • 2.41.4unaffected
pkg:npm/n8n

n8n-io n8n

Default version status: unaffected

  • 2.42.0 to < 2.42.1affected
  • 2.42.1unaffected
pkg:npm/n8n

References