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Verdict

HIGH SEVERITY (CVSS 8.8)

What is this: n8n before 2.34.1 and 2.33.4 contains an authorization bypass in the custom project role deletion (reassignment) path. When deleting a custom project … (CWE-639) Affects N8N N8N.
Should you care: Rated high severity — CVSS 8.8.
What to do: Patch when able.

OBSERVEDMODERATE EVIDENCE COVERAGEDeterministic · stored evidence only

Vulnerability investigation

Prioritize by applicability, impact, and exploitation evidence

CISA KEV status could not be verified from the available evidence. NVD rates the technical severity high at CVSS 8.8. These are public vulnerability signals, not proof that a specific environment runs an affected version.

Exploitation status

KEV status unavailable

The KEV source did not return a conclusive status.

30-day exploitation likelihood

Unavailable

FIRST EPSS did not return a score.

Technical severity

8.8 · high

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected surface

2 parsed products

N8N N8N, N8N N8N 2.34.0

Weakness class

CWE-639

CWE describes the weakness category, not whether a deployed product is reachable or exploitable.

Corpus evidence

2 connectors · 8 citations

No related report text is available in the local corpus.

What the evidence supports

Findings stay bounded to named sources and observable infrastructure.

2 findings

CVSS 8.8 high technical impact

HIGH

Network · Low · None

NIST NVD CVSS

CVSS measures technical severity and prerequisites; it does not measure observed exploitation likelihood.

2 affected product mappings

MODERATE

N8N N8N, N8N N8N 2.34.0

NVD CPE / CISA product metadata

Product names are candidate applicability pivots. Confirm exact deployed versions and vendor ranges before remediation decisions.

What remains unknown

Whether your environment runs an affected product and version is not established by this public lookup.
Reachability, compensating controls, and successful exploitation in a specific environment are not checked.
CISA KEV status is unavailable and must be retried before drawing an exploitation conclusion.
No locally ingested public report supplies exploit, actor, or campaign context for this CVE.

What this is

n8n before 2.34.1 and 2.33.4 contains an authorization bypass in the custom project role deletion (reassignment) path. When deleting a custom project role with a reassignment target, the code validated only that the target role existed and was project-scoped, performing no project-level authorization check. A user holding only the narrow role:manageProject global scope could delete any custom project role in use on the instance and reassign its holders (including themselves) to the built-in project:admin role, gaining full administrative control of projects they had no legitimate access to.

Evidence readiness

The base CVE appears first. Independent evidence is added without blocking the page.

Investigation status

Checking for newly completed evidence

Refreshing

NIST NVD

NVD evidence is available in this response

Ready

CISA KEV

Known-exploitation catalog check is pending

Pending

FIRST EPSS

Forensia does not request or publish EPSS while source rights are under review

Rights pending

Reports

Report links are still being resolved

Pending

Relationships

Product and vulnerability relationships are still being prepared

Pending

Affected products

Vendor/product strings parsed from local CPE URIs (no inferred ATT&CK).

Product	CPE (truncated)
N8n N8n 2.34.0	cpe:2.3:a:n8n:n8n:2.34.0:::::node.js::
N8n N8n	cpe:2.3:a:n8n:n8n::::::node.js::*

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