CVE-2026-110846: Incorrect Behavior Order: Validate Before Canonicalize in n8n-io n8n
Description
CVE-2026-110846 is a high-severity vulnerability in n8n versions before 2.41.4 and in 2.42.x before 2.42.1. It involves a signature bypass in the waiting-webhook endpoint due to improper ordering of validation and canonicalization steps. Attackers with an execution's resume token can approve waiting executions intended for others, potentially executing downstream actions with the workflow owner's credentials, including command execution.
CVSS v4.0
Score 7.0high
Affected software
n8n-io
n8n
pkg:github/n8n-io/n8nRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in n8n arises from the waiting-webhook endpoint performing Send-and-Wait validation before normalizing an alternate node reference form. This incorrect order allows attackers possessing a resume token for an execution to bypass signature validation and approve executions meant for other users. Consequently, attackers can run downstream workflow actions under the workflow owner's privileges, which may include executing commands. The affected versions are n8n prior to 2.41.4 and versions 2.42.0 up to but not including 2.42.1.
Potential Impact
An attacker who obtains a resume token for an execution can bypass signature validation and approve executions intended for other users. This enables the attacker to execute downstream actions with the workflow owner's credentials, potentially leading to unauthorized command execution within the affected system. The vulnerability could allow privilege escalation and unauthorized workflow manipulation.
Mitigation Recommendations
A fix is available in n8n versions 2.41.4 and 2.42.1. Users should upgrade to these or later versions to remediate the vulnerability. No additional mitigation steps are indicated beyond applying the official patches.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-14T22:12:22.055Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad00a612cdf04f656ba0260
Added to database: 10/14/2026, 23:04:01 UTC
Last enriched: 10/14/2026, 23:19:33 UTC
Last updated: 10/14/2026, 23:28:20 UTC
Views: 6
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.