EUVD-2026-90650
GHSA-6m32-557f-fqq9
Severity by source
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/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
PR:L for required credential-update permission; S:C and C:H because a password for a separate downstream system (Wekan/Baserow) is disclosed; I:L for the host-field tampering, A:N.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
5DescriptionCVE.org
n8n versions before 2.39.6 and 2.40.0 before 2.40.1 contain a credentials leak vulnerability in the Wekan and Baserow username-and-password credentials that sends unencrypted passwords to unvalidated hosts. Attackers with credential update permissions can modify the host field to receive account passwords at arbitrary hosts, bypassing domain validation controls.
Articles & Coverage 1
AnalysisAI
Credential theft in n8n before 2.39.6 and 2.40.0 before 2.40.1 allows an authenticated user with credential-update permissions to modify the host field of Wekan or Baserow username-and-password credentials, causing unencrypted passwords to be sent to an attacker-controlled destination that bypasses n8n's domain validation. Exploitation requires that the tampered credential is actually used by a workflow, and the attacker must already hold a valid account or session with rights to edit credentials. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
No credit card · 7-day full trial
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an authenticated n8n user who holds credential-update permissions (PR:L) and the presence of a Wekan or Baserow username-and-password credential type; the attacker modifies that credential's host field to an attacker-controlled destination, bypassing n8n's domain validation. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Moderate, authenticated-only credential-theft risk. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Vendor-released patches are available: upgrade to n8n 2.39.6 or later, or to 2.40.1 or later for the 2.40.x line. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all n8n deployments and identify instances running versions before 2.39.6 or 2.40.0 before 2.40.1; apply the vendor-released patch to version 2.39.6 or 2.40.1 (or later) on internet-facing or business-critical instances first, and if patching cannot be completed immediately, restrict credential-edit permissions to essential personnel, review Wekan and Baserow credentials for unexpected host-field changes, and rotate any credentials suspected of exposure. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
A vulnerability in the NuPoint Unified Messaging (NPM) component of Mitel MiCollab through 9.8 SP1 FP2 (9.8.1.201) could
FortiOS and FortiProxy contain an authentication bypass via the Node.js websocket module allowing unauthenticated remote
Denial of service against HTTP/2 server implementations allows remote unauthenticated attackers to exhaust server resour
Eval injection vulnerability in the internals.batch function in lib/batch.js in the bassmaster plugin before 1.5.2 for t
Flowise version 3.0.5 contains a remote code execution vulnerability in the CustomMCP node. The mcpServerConfig paramete
Node.js 8.5.0 before 8.6.0 allows remote attackers to access unintended files, because a change to ".." handling was inc
An issue was discovered in the node-serialize package 0.0.4 for Node.js. Rated critical severity (CVSS 9.8), this vulner
OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h does not properly restrict processing of ChangeCiph
Directory traversal vulnerability in the st module before 0.2.5 for Node.js allows remote attackers to read arbitrary fi
Multiple SQL injection vulnerabilities in the Manage Accounts page in the AccountManagement.asmx service in the Solarwin
The JS-YAML module before 2.0.5 for Node.js parses input without properly considering the unsafe !!js/function tag, whic
The AES-NI implementation in OpenSSL before 1.0.1t and 1.0.2 before 1.0.2h does not consider memory allocation during a
Same weakness CWE-522 – Insufficiently Protected Credentials
View allSame technique Information Disclosure
View allShare
External POC / Exploit Code
Leaving vuln.today