n8n before 2.29.8 and 2.30.x before 2.30.1 (affected from 2.27.0, when the OAuth 2.1 consent and token-issuance flow was introduced) does not verify that the authenticated user has access to the workflow referenced as the OAuth resource. On…
Exact source revision recorded 25 Oct 2026 15:18:45 UTC. It does not establish the source's current position. Latest evidence.
nvd · CVE-2026-65594
Publishedn8n before 2.29.8 and 2.30.x before 2.30.1 (affected from 2.27.0, when the OAuth 2.1 consent and token-issuance flow was introduced) does not verify that the authenticated user has access to the workflow referenced as the OAuth resource. On instances with at least one active MCP Server Trigger workflow configured with n8n OAuth2 authentication, a member-level user can register an OAuth client, self-approve consent for another user's workflow, and obtain a valid token. The workflow then runs in the owner's project context with the owner's stored credentials, and the attacker can set tool inputs and read outputs (potentially including data from the owner's connected integrations), breaking user and project isolation.
NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.
Source analysis status: Analyzed
Weakness classifications: CWE-863
Original publisher date fields
published: 2026-07-22T12:18:19.527
lastModified: 2026-10-24T17:10:00.220
4 source CPE criteria · context only
- cpe:2.3:a:n8n:n8n:*:*:*:*:community:node.js:*:*
- cpe:2.3:a:n8n:n8n:*:*:*:*:enterprise:node.js:*:*
- cpe:2.3:a:n8n:n8n:2.30.0:*:*:*:community:node.js:*:*
- cpe:2.3:a:n8n:n8n:2.30.0:*:*:*:enterprise:node.js:*:*
The original JSON retains the logical configuration operators, exclusions and version bounds.
- Source published
- 22 Jul 2026 12:18:19 UTC
- Source modified
- 24 Oct 2026 17:10:00 UTC
- Observed here
- 25 Oct 2026 15:18:45 UTC
- Source terms
- NIST NVD usage terms; underlying source attribution retained
Original source record · Cite this exact observation · Complete original publisher JSON
This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.
CVSS 4.0 · [email protected] · Secondary · 5.1 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:H/SI:L/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
CVSS 3.1 · [email protected] · Primary · 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N