CVE-2026-103260CWE-862broken-access-control

CVE-2026-103260

Medium · published October 1, 2026

CVSS v3.1
4.0
EPSS
0%
Percentile
19.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.0 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
CVSS v4.0
6.3 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N
EPSS
0.00281 · 19.5th percentile
Weakness
CWE-862 · Missing Authorization
Published
2026-10-01T15:17Z
References (2)
https://github.com/n8n-io/n8n/security/advisories/GHSA-342v-gmh6-738j · [email protected]https://www.vulncheck.com/advisories/n8n-before-2.39.6-and-2.40-x-before-2.40.1-approval-bypass-via-send-and-wait-node · [email protected]
EPSS history
Timeline
  • 03 OCT 03:41Z
    EPSS moved — → 0%
    epss
  • 01 OCT 10:42Z
    n8n before 2.39.6 and 2.40.x before 2.40.1 Approval Bypass via Send and Wait Node
    cvelistv5