Common Weakness Enumeration
CWE-639
AllowedAuthorization Bypass Through User-Controlled Key
Abstraction: Base · Status: Incomplete
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
3973 vulnerabilities reference this CWE, most recent first.
CVE-2026-77135 (GCVE-0-2026-77135)
Vulnerability from cvelistv5 – Published: 2026-08-25 09:00 – Updated: 2026-08-25 14:51
VLAI
EPSS
VEX
Title
Information Disclosure in extension "femanager" (femanager)
Summary
The extension's user detail view fails to verify that a requested user record matches the configured or logged-in target, allowing any visitor with access to the Detail or List plugin to retrieve another frontend user's profile data, including name, email, date of birth and address, by supplying an arbitrary user ID.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 14:42 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://typo3.org/security/advisory/typo3-ext-sa-… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| TYPO3 | Extension "femanager" |
Affected:
13.0.0 , < 13.3.5
(semver)
Affected: 8.0.0 , < 8.4.2 (semver) Affected: 7.0.0 , < 7.5.5 (semver) Affected: 0 , < 6.4.5 (semver) |
Date Public
2026-08-25 09:00
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CVE-2026-77127 (GCVE-0-2026-77127)
Vulnerability from cvelistv5 – Published: 2026-08-25 09:00 – Updated: 2026-08-25 14:09
VLAI
EPSS
VEX
Title
Information Disclosure in extension "Modules" (modules)
Summary
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Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 14:07 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://typo3.org/security/advisory/typo3-ext-sa-… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| TYPO3 | Extension "Modules" |
Affected:
8.0.0 , < 8.1.4
(semver)
Affected: 0 , < 7.10.4 (semver) |
Date Public
2026-08-25 09:00
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CVE-2026-77081 (GCVE-0-2026-77081)
Vulnerability from cvelistv5 – Published: 2026-08-20 11:21 – Updated: 2026-08-21 11:21
VLAI
EPSS
VEX
Title
n8n before 1.123.69 Allowed-Domains Bypass via GraphQL Node
Summary
n8n before 1.123.69, 2.x before 2.33.4, and 2.x before 2.34.1 contain an allowed-domains bypass in the GraphQL node. When the node's Authentication parameter is set to expression mode, every authentication-gated credential selector is treated as active; if two credentials of different types are attached, the node enforces the allowed-domains policy of only the first credential while still attaching material from both. An authenticated user with workflow-authoring rights can thereby send a domain-restricted credential to an attacker-controlled endpoint, exfiltrating it with the leaked credential's permissions.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 13:41 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/n8n-io/n8n/security/advisories… | vendor-advisory |
| https://www.vulncheck.com/advisories/n8n-before-a… | third-party-advisory |
Impacted products
Date Public
2026-08-05 00:00
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CVE-2026-77079 (GCVE-0-2026-77079)
Vulnerability from cvelistv5 – Published: 2026-08-20 11:21 – Updated: 2026-08-25 14:30
VLAI
EPSS
VEX
Title
n8n before 2.34.1 Authorization Bypass via Custom Role Deletion
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 14:29 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/n8n-io/n8n/security/advisories… | vendor-advisory |
| https://www.vulncheck.com/advisories/n8n-before-a… | third-party-advisory |
Impacted products
Date Public
2026-08-05 00:00
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CVE-2026-77073 (GCVE-0-2026-77073)
Vulnerability from cvelistv5 – Published: 2026-08-20 11:21 – Updated: 2026-08-25 14:27
VLAI
EPSS
VEX
Title
n8n before 2.34.1 Cross-Project Credential Access via MCP
Summary
n8n versions before 2.34.1 contain a credential validation bypass in the MCP create_workflow_from_code tool when authentication type is set to an expression. Attackers with a valid MCP Bearer API key and knowledge of a target credential ID can persist unauthorized cross-project credential references on workflows in different projects.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 14:27 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/n8n-io/n8n/security/advisories… | vendor-advisory |
| https://www.vulncheck.com/advisories/n8n-before-c… | third-party-advisory |
Impacted products
Date Public
2026-08-05 00:00
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CVE-2026-77035 (GCVE-0-2026-77035)
Vulnerability from cvelistv5 – Published: 2026-08-27 05:46 – Updated: 2026-08-28 07:43
VLAI
EPSS
VEX
Title
Joomla Extension - joomlaeventmanager.net - Cross-user event and venue takeover through forged form fields in Joomla Event Manager < 5.0.1
Summary
Joomla Extension - joomlaeventmanager.net - Cross-user event and venue takeover through forged form fields in Joomla Event Manager < 5.0.1 - A registered user with edit-own rights (the eventowner=1 setting or core.edit.own) can POST another user's record id together with their own id as created_by and take over that record.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 13:49 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.joomlaeventmanager.net/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| joomlaeventmanager.net | JEM - Joomla Event Manager extension for Joomla |
Affected:
1.0.0-5.0.0
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CVE-2026-76634 (GCVE-0-2026-76634)
Vulnerability from cvelistv5 – Published: 2026-08-20 13:48 – Updated: 2026-08-20 14:49 X_Open Source
VLAI
EPSS
VEX
Title
WeGIA < 3.9.2 Insecure Direct Object Reference via profile_funcionario.php
Summary
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Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 14:49 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/LabRedesCefetRJ/WeGIA/security… | vendor-advisory |
| https://github.com/LabRedesCefetRJ/WeGIA/releases… | release-notes |
| https://www.vulncheck.com/advisories/wegia-insecu… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| LabRedesCefetRJ | WeGIA |
Affected:
0 , < 3.9.2
(semver)
|
Date Public
2026-07-20 00:00
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CVE-2026-76397 (GCVE-0-2026-76397)
Vulnerability from cvelistv5 – Published: 2026-08-19 21:35 – Updated: 2026-08-20 15:26
VLAI
EPSS
VEX
Title
Improper Access Control in Experiment History through the REST API in Splunk AI Toolkit
Summary
In Splunk AI Toolkit versions below 6.0.0, a user who holds the "power" Splunk role could access and delete all relevant data in experiment history, including data associated with other users. The vulnerability is possible because Splunk AI Toolkit does not preserve the trusted experiment scope when it processes caller-controlled query values before accessing restricted history data. For more information see Experiment Assistants (https://help.splunk.com/en/splunk-cloud-platform/apply-machine-learning/use-ai-toolkit/5.6.4/experiment-assistants) in the Splunk documentation.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:13 UTC
CWE
- CWE-639 - The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Splunk | Splunk AI Toolkit |
Affected:
5.7 , < 6.0.0
(custom)
|
Date Public
2026-08-19 00:00
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CVE-2026-76263 (GCVE-0-2026-76263)
Vulnerability from cvelistv5 – Published: 2026-08-19 21:34 – Updated: 2026-08-26 19:57
VLAI
EPSS
VEX
Title
Improper Access Control through the REST API in Splunk Enterprise
Summary
In Splunk Enterprise versions below 10.4.2 and 10.2.6, a user who does not hold the "admin" or "power" Splunk roles could delete Splunk Processing Language version 2 (SPL2) modules belonging to other users through the data management orchestrator interface. The vulnerability does not affect Splunk Enterprise versions below 10.2. The broken object level authorization is possible because the data management orchestrator does not verify that the requesting user owns the target resources before it deletes the modules. For more information see Manage SPL2-based apps (https://help.splunk.com/en/splunk-enterprise/administer/admin-manual/10.4/meet-splunk-apps/manage-spl2-based-apps) in the Splunk documentation.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 19:42 UTC
CWE
- CWE-639 - The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Splunk | Splunk Enterprise |
Affected:
10.4 , < 10.4.2
(custom)
Affected: 10.2 , < 10.2.6 (custom) |
Date Public
2026-08-19 00:00
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CVE-2026-76237 (GCVE-0-2026-76237)
Vulnerability from cvelistv5 – Published: 2026-08-19 14:02 – Updated: 2026-08-21 11:21
VLAI
EPSS
VEX
Title
stigmem before 0.9.0a12 Cross-Tenant BOLA via quarantine
Summary
stigmem-node before 0.9.0a12 contains a broken object level authorization (cross-tenant BOLA) vulnerability in the quarantine review endpoints. On multi-tenant deployments running the opt-in stigmem-plugin-multi-tenant, the list/count queries and _get_quarantined_fact in routes/quarantine.py lacked a tenant_id predicate and the garden lookup was not tenant-scoped, allowing a tenant administrator with only a plain tenant write capability to list, read, and admit or reject quarantined facts belonging to other tenants via the /v1/quarantine endpoints. Default single-tenant deployments are not affected.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:39 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/eidetic-labs/stigmem/security/… | vendor-advisory |
| https://www.vulncheck.com/advisories/stigmem-befo… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| eidetic-labs | stigmem-node |
Affected:
0 , < 0.9.0a12
(python)
Unaffected: 0.9.0a12 (python) |
Date Public
2026-06-19 00:00
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Mitigation
Architecture and Design
For each and every data access, ensure that the user has sufficient privilege to access the record that is being requested.
Mitigation
Architecture and Design
Implementation
Make sure that the key that is used in the lookup of a specific user's record is not controllable externally by the user or that any tampering can be detected.
Mitigation
Architecture and Design
Use encryption in order to make it more difficult to guess other legitimate values of the key or associate a digital signature with the key so that the server can verify that there has been no tampering.
No CAPEC attack patterns related to this CWE.