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Vulnerability Details :

CVE-2026-45707

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-29 May, 2026 | 13:35
Updated At-29 May, 2026 | 13:35
Rejected At-
Credits

n8n-MCP: Multi-tenant MCP requests fall back to process-level n8n credentials when tenant headers are absent or incomplete

n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.51.2, when ENABLE_MULTI_TENANT=true, the HTTP transport documents that the target n8n instance is selected per-request from x-n8n-url / x-n8n-key headers. Requests that omitted those headers — or supplied only one of them — silently fell back to the process-level N8N_API_URL / N8N_API_KEY credentials configured for the operator's own n8n instance. As a result, an authenticated MCP tenant could cause n8n management calls to execute against the operator's instance instead of its own. This affects HTTP-mode deployments of n8n-mcp that are run as a shared multi-tenant service. Single-tenant deployments (ENABLE_MULTI_TENANT unset or false) are not affected. This vulnerability is fixed in 2.51.2.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:29 May, 2026 | 13:35
Updated At:29 May, 2026 | 13:35
Rejected At:
▼CVE Numbering Authority (CNA)
n8n-MCP: Multi-tenant MCP requests fall back to process-level n8n credentials when tenant headers are absent or incomplete

n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.51.2, when ENABLE_MULTI_TENANT=true, the HTTP transport documents that the target n8n instance is selected per-request from x-n8n-url / x-n8n-key headers. Requests that omitted those headers — or supplied only one of them — silently fell back to the process-level N8N_API_URL / N8N_API_KEY credentials configured for the operator's own n8n instance. As a result, an authenticated MCP tenant could cause n8n management calls to execute against the operator's instance instead of its own. This affects HTTP-mode deployments of n8n-mcp that are run as a shared multi-tenant service. Single-tenant deployments (ENABLE_MULTI_TENANT unset or false) are not affected. This vulnerability is fixed in 2.51.2.

Affected Products
Vendor
czlonkowski
Product
n8n-mcp
Versions
Affected
  • < 2.51.2
Problem Types
TypeCWE IDDescription
CWECWE-284CWE-284: Improper Access Control
Type: CWE
CWE ID: CWE-284
Description: CWE-284: Improper Access Control
Metrics
VersionBase scoreBase severityVector
3.18.1HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Version: 3.1
Base score: 8.1
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-jxx9-px88-pj69
x_refsource_CONFIRM
https://github.com/czlonkowski/n8n-mcp/commit/853015d0897be7cf2d9d4726de195c938e4395ab
x_refsource_MISC
https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.51.2
x_refsource_MISC
Hyperlink: https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-jxx9-px88-pj69
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/czlonkowski/n8n-mcp/commit/853015d0897be7cf2d9d4726de195c938e4395ab
Resource:
x_refsource_MISC
Hyperlink: https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.51.2
Resource:
x_refsource_MISC
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:29 May, 2026 | 14:16
Updated At:29 May, 2026 | 15:06

n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.51.2, when ENABLE_MULTI_TENANT=true, the HTTP transport documents that the target n8n instance is selected per-request from x-n8n-url / x-n8n-key headers. Requests that omitted those headers — or supplied only one of them — silently fell back to the process-level N8N_API_URL / N8N_API_KEY credentials configured for the operator's own n8n instance. As a result, an authenticated MCP tenant could cause n8n management calls to execute against the operator's instance instead of its own. This affects HTTP-mode deployments of n8n-mcp that are run as a shared multi-tenant service. Single-tenant deployments (ENABLE_MULTI_TENANT unset or false) are not affected. This vulnerability is fixed in 2.51.2.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.18.1HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Type: Secondary
Version: 3.1
Base score: 8.1
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CPE Matches

Weaknesses
CWE IDTypeSource
CWE-284Primarysecurity-advisories@github.com
CWE ID: CWE-284
Type: Primary
Source: security-advisories@github.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/czlonkowski/n8n-mcp/commit/853015d0897be7cf2d9d4726de195c938e4395absecurity-advisories@github.com
N/A
https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.51.2security-advisories@github.com
N/A
https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-jxx9-px88-pj69security-advisories@github.com
N/A
Hyperlink: https://github.com/czlonkowski/n8n-mcp/commit/853015d0897be7cf2d9d4726de195c938e4395ab
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.51.2
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-jxx9-px88-pj69
Source: security-advisories@github.com
Resource: N/A

Change History

0
Information is not available yet

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Updated-10 Jul, 2025 | 15:33
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

TestLink 1.9.20 is vulnerable to Incorrect Access Control in the TestPlan editing section. When a new TestPlan is created, an ID with an incremental value is automatically generated. Using the edit function you can change the tplan_id parameter to another ID. The application does not carry out a check on the user's permissions maing it possible to recover the IDs of all the TestPlans (even the administrative ones) and modify them even with minimal privileges.

Action-Not Available
Vendor-testlinkn/atestlink
Product-testlinkn/atestlink
CWE ID-CWE-284
Improper Access Control
CVE-2024-26139
Matching Score-4
Assigner-GitHub, Inc.
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Matching Score-4
Assigner-GitHub, Inc.
CVSS Score-8.3||HIGH
EPSS-0.16% / 36.40%
||
7 Day CHG~0.00%
Published-23 May, 2024 | 11:47
Updated-22 May, 2025 | 18:07
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
OpenCTI Authenticated Privilege Escalation

OpenCTI is an open source platform allowing organizations to manage their cyber threat intelligence knowledge and observables. Due to lack of certain security controls on the profile edit functionality, an authenticated attacker with low privileges can gain administrative privileges on the web application.

Action-Not Available
Vendor-citeumOpenCTI-Platformopencti-platform
Product-openctiopenctiopencti
CWE ID-CWE-284
Improper Access Control
CWE ID-CWE-657
Violation of Secure Design Principles
CVE-2020-7578
Matching Score-4
Assigner-Siemens
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Matching Score-4
Assigner-Siemens
CVSS Score-8.1||HIGH
EPSS-0.40% / 60.99%
||
7 Day CHG~0.00%
Published-14 Jul, 2020 | 13:18
Updated-04 Aug, 2024 | 09:33
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A vulnerability has been identified in Camstar Enterprise Platform (All versions), Opcenter Execution Core (All versions < V8.2). Authenticated users could have access to resources they normally would not have. This vulnerability could allow an attacker to view internal information and perform unauthorized changes.

Action-Not Available
Vendor-Siemens AG
Product-opcenter_execution_coreCamstar Enterprise PlatformOpcenter Execution Core
CWE ID-CWE-284
Improper Access Control
CWE ID-CWE-269
Improper Privilege Management
CVE-2024-2505
Matching Score-4
Assigner-WPScan
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Matching Score-4
Assigner-WPScan
CVSS Score-8.1||HIGH
EPSS-0.63% / 70.69%
||
7 Day CHG~0.00%
Published-29 Apr, 2024 | 06:00
Updated-08 May, 2025 | 18:24
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
GamiPress < 6.8.9 - Broken Access Control

The GamiPress WordPress plugin before 6.8.9's access control mechanism fails to properly restrict access to its settings, permitting Authors to manipulate requests and extend access to lower privileged users, like Subscribers, despite initial settings prohibiting such access. This vulnerability resembles broken access control, enabling unauthorized users to modify critical GamiPress WordPress plugin before 6.8.9 configurations.

Action-Not Available
Vendor-gamipressUnknowngamipress
Product-gamipressGamiPress gamipress
CWE ID-CWE-284
Improper Access Control
CVE-2024-21153
Matching Score-4
Assigner-Oracle
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Matching Score-4
Assigner-Oracle
CVSS Score-8.1||HIGH
EPSS-0.83% / 74.85%
||
7 Day CHG~0.00%
Published-16 Jul, 2024 | 22:40
Updated-17 Jun, 2025 | 19:59
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Vulnerability in the Oracle Process Manufacturing Product Development product of Oracle E-Business Suite (component: Quality Management Specs). The supported version that is affected is 12.2.13. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Process Manufacturing Product Development. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Process Manufacturing Product Development accessible data as well as unauthorized access to critical data or complete access to all Oracle Process Manufacturing Product Development accessible data. CVSS 3.1 Base Score 8.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N).

Action-Not Available
Vendor-Oracle Corporation
Product-process_manufacturing_product_developmentProcess Manufacturing Product Developmentprocess_manufacturing_product_development
CWE ID-CWE-284
Improper Access Control
CVE-2024-12368
Matching Score-4
Assigner-Odoo
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Matching Score-4
Assigner-Odoo
CVSS Score-8.1||HIGH
EPSS-0.06% / 19.84%
||
7 Day CHG~0.00%
Published-25 Feb, 2025 | 18:10
Updated-25 Feb, 2025 | 19:15
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Improper access control in the auth_oauth module of Odoo Community 15.0 and Odoo Enterprise 15.0 allows an internal user to export the OAuth tokens of other users.

Action-Not Available
Vendor-Odoo
Product-Odoo CommunityOdoo Enterprise
CWE ID-CWE-284
Improper Access Control
CVE-2014-3120
Matching Score-4
Assigner-MITRE Corporation
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Matching Score-4
Assigner-MITRE Corporation
CVSS Score-8.1||HIGH
EPSS-84.24% / 99.33%
||
7 Day CHG+1.64%
Published-28 Jul, 2014 | 19:00
Updated-22 Apr, 2026 | 14:33
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Known KEV||Action Due Date - 2022-04-15||Apply updates per vendor instructions.

The default configuration in Elasticsearch before 1.2 enables dynamic scripting, which allows remote attackers to execute arbitrary MVEL expressions and Java code via the source parameter to _search. NOTE: this only violates the vendor's intended security policy if the user does not run Elasticsearch in its own independent virtual machine.

Action-Not Available
Vendor-n/aElasticsearch BV
Product-elasticsearchn/aElasticsearch
CWE ID-CWE-284
Improper Access Control
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