high7.1
CVE-2026-118678
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 …
Impact
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
| Product | Affected versions |
|---|---|
| N8n | before 2.41.4 |
| 2.42.X | before 2.42.1 |
Versions were read from the advisory text. No structured product data has been published for this record yet.