Medium severity4.0NVD Advisory· Published Oct 1, 2026· Updated Oct 1, 2026

CVE-2026-103260

Description

n8n versions before 2.39.6 and 2.40.0 before 2.40.1 contain an approval bypass vulnerability in the Send and Wait node's Approve Within Chat mode. Attackers can submit resume requests without verification of the requester's identity or approval permissions, allowing unauthenticated users to advance waiting executions and trigger guarded actions.

Affected products

N8n Io/N8nllm-fuzzy
Range: <2.39.6, 2.40.0-2.40.1

Patches

Vulnerability mechanics

References

github.com/n8n-io/n8n/security/advisories/GHSA-342v-gmh6-738jnvd
www.vulncheck.com/advisories/n8n-before-2.39.6-and-2.40-x-before-2.40.1-approval-bypass-via-send-and-wait-nodenvd

News mentions

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