n8n before 1.123.83 Credential Authorization Bypass via Nested Inline Sub-Workflows

published 2026-10-14 25 d ago modified 2026-10-15 24 d ago also EUVD-2026-101727

cvss: 7.2; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits: 0; none known

n8n before 1.123.83 contains an authorization bypass vulnerability that allows shared-workflow editors to use credentials they cannot access by embedding them in nested or tool inline sub-workflows. Attackers can save workflows with Workflow Tool or Workflow Retriever inline definitions referencing restricted credentials, which execute using the workflow owner's credential values.

Patch / fix

fixed in 1

n8n-io n8n 1.123.83

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 24 d ago (2026-10-15)

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	7.2	CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:H/SA:N
CNA	4.0	7.2	CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

n8n-io n8n

Classification

Weakness

CWE-863 Incorrect Authorization

References

github.com /n8n-io/n8n/security/advisories/GHSA-r6g9-5cpp-ppwr
vendor-advisory
vulncheck.com /advisories/n8n-before-1.123.83-credential-authorization-bypass-via-nested-inline-sub-workflows
third-party-advisory

Sources

CVE List CVE-2026-110844
NVD CVE-2026-110844

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary