CVE-2026-110853: Authorization Bypass Through User-Controlled Key in n8n-io n8n
Description
n8n versions before 1.123.83 have an authorization bypass vulnerability that allows authenticated users to spoof workflow identities by providing a trusted identifier in Execute Sub-workflow inline JSON mode. This flaw enables attackers to access credentials from projects they do not belong to and modify static data and error workflows of other workflows.
CVSS v4.0
Score 7.1high
Affected software
n8n-io
n8n
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-110853 affects n8n versions prior to 1.123.83 and involves an authorization bypass through a user-controlled key. Authenticated members can supply a trusted identifier in the Execute Sub-workflow inline JSON mode to impersonate workflow identities. This allows them to resolve credentials belonging to unauthorized projects and alter another workflow's static data and error-workflow dispatch, potentially impacting workflow integrity and confidentiality.
Potential Impact
The vulnerability permits authenticated users to bypass authorization controls, leading to unauthorized access to credentials from projects they do not belong to. It also allows modification of static data and error workflows of other workflows, which could disrupt workflow operations or cause unintended behavior.
Mitigation Recommendations
Upgrade n8n to version 1.123.83 or later where this vulnerability is fixed. No other mitigation or temporary workaround is indicated. Patch status is confirmed by the affectedVersions field indicating the fix in 1.123.83.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-14T22:16:22.734Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad00a642cdf04f656ba02f3
Added to database: 10/14/2026, 23:04:04 UTC
Last enriched: 10/14/2026, 23:19:05 UTC
Last updated: 10/14/2026, 23:20:01 UTC
Views: 4
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