HIGHCVSS v3.1 7.1Vulnerability
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 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.
Properties
- Severity
- HIGH
- Nvd fetched at
- 2026-10-28T19:43:42.952230+00:00
- Cvss severity
- HIGH
- Cvss score
- 7.1
- Retrieved at
- 2026-10-28T19:44:28+00:00
- Score
- 7.1
- Cvss version
- 3.1
- Last source
- NVD
- Cve id
- CVE-2026-118678
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
- First seen by Signal
- 2026-10-28T19:44:28+00:00
- Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
- Published at
- 2026-10-28T19:17:33.957
- Last modified
- 2026-10-28T19:17:34.077
Related Entities (1)
HAS_WEAKNESS (1)
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