Common Weakness Enumeration

CWE-639

Allowed

Authorization 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.

5456 vulnerabilities reference this CWE, most recent first.

CVE-2026-4630 (GCVE-0-2026-4630)

Vulnerability from cvelistv5 – Published: 2026-05-19 10:28 – Updated: 2026-05-20 16:08
VLAI
Title
Keycloak: keycloak: unauthorized resource access and data modification via insecure direct object reference
Summary
A flaw was found in Keycloak. An authenticated client could exploit an Insecure Direct Object Reference (IDOR) vulnerability in the Authorization Services Protection API endpoint. By knowing or obtaining a resource's unique identifier (UUID) belonging to another Resource Server within the same realm, the client could bypass authorization checks. This allows the client to perform unauthorized GET, PUT, and DELETE operations on resources, leading to information disclosure and potential unauthorized modification or deletion of data.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-19 16:33 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
redhat CNA under the redhat root
CNA scorecard B 82/100 over 1081 records in the last 180 days details
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:19596 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19597 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-4630 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2450245 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4.12-1 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.4::el9
Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4-17 , < * (rpm)
    cpe:/a:redhat:build_keycloak:26.4::el9
Create a notification for this product.
Red Hat Red Hat build of Keycloak 26.4.12     cpe:/a:redhat:build_keycloak:26.4::el9
Create a notification for this product.
Date Public
2026-04-15 12:34
Show details on NVD website

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CVE-2026-4563 (GCVE-0-2026-4563)

Vulnerability from cvelistv5 – Published: 2026-03-22 23:51 – Updated: 2026-03-25 13:53
VLAI
Title
MacCMS Member Order Detail User.php order_info authorization
Summary
A weakness has been identified in MacCMS up to 2025.1000.4052. This vulnerability affects the function order_info of the file application/index/controller/User.php of the component Member Order Detail Interface. This manipulation of the argument order_id causes authorization bypass. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-25 13:52 UTC
CWE
Assigner
VulDB CNA under the mitre root
CNA scorecard B 83/100 over 3788 records in the last 180 days details
References
URL Tags
https://vuldb.com/?id.352400 vdb-entrytechnical-description
https://vuldb.com/?ctiid.352400 signaturepermissions-required
https://vuldb.com/?submit.775050 third-party-advisory
https://github.com/HuajiHD/CVE/issues/10 exploitissue-tracking
Impacted products
Vendor Product Version
n/a MacCMS Affected: 2025.1000.4052
    cpe:2.3:a:maccms:maccms:*:*:*:*:*:*:*:*
Show details on NVD website

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CVE-2026-4549 (GCVE-0-2026-4549)

Vulnerability from cvelistv5 – Published: 2026-03-22 13:47 – Updated: 2026-03-25 13:45
VLAI
Title
mickasmt next-saas-stripe-starter Stripe API open-customer-portal.ts openCustomerPortal authorization
Summary
A flaw has been found in mickasmt next-saas-stripe-starter 1.0.0. Affected by this issue is the function openCustomerPortal of the file actions/open-customer-portal.ts of the component Stripe API. This manipulation causes authorization bypass. Remote exploitation of the attack is possible. The complexity of an attack is rather high. The exploitation is known to be difficult.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-25 13:45 UTC
CWE
Assigner
VulDB CNA under the mitre root
CNA scorecard B 83/100 over 3788 records in the last 180 days details
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URL Tags
https://vuldb.com/?id.352376 vdb-entrytechnical-description
https://vuldb.com/?ctiid.352376 signaturepermissions-required
https://vuldb.com/?submit.774806 third-party-advisory
Impacted products
Show details on NVD website

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CVE-2026-4503 (GCVE-0-2026-4503)

Vulnerability from cvelistv5 – Published: 2026-04-30 20:48 – Updated: 2026-06-12 18:09
VLAI
Title
Unauthenticated Insecure Direct Object Reference (IDOR) Vulnerability in Langflow Desktop Image Download Endpoint
Summary
IBM Langflow Desktop 1.0.0 through 1.8.4 Langflow could allow an unauthenticated user to view other users' images due to an indirect object reference through a user-controlled key.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-01 14:00 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
ibm CNA under the mitre root
CNA scorecard B 88/100 over 1308 records in the last 180 days details
References
URL Tags
https://www.ibm.com/support/pages/node/7271099 vendor-advisorypatch
Impacted products
Vendor Product Version
IBM Langflow Desktop Affected: 1.0.0 , ≤ 1.8.4 (semver)
    cpe:2.3:a:ibm:langflow_desktop:1.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:langflow_desktop:1.8.4:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-4400 (GCVE-0-2026-4400)

Vulnerability from cvelistv5 – Published: 2026-03-31 10:12 – Updated: 2026-03-31 13:30
VLAI
Title
Multiple vulnerabilities in 1millionbot Millie chatbot
Summary
Insecure Direct Object Reference (IDOR) vulnerability in 1millionbot Millie chat that allows private conversations of other users being viewed by simply changing the conversation ID. The vulnerability is present in the endpoint 'api.1millionbot.com/api/public/conversations/' and, if exploited, could allow a remote attacker to access other users private chatbot conversations, revealing sensitive or confidential data without requiring credentials or impersonating users. In order for the vulnerability to be exploited, the attacker must have the user's conversation ID.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-31 13:30 UTC
CWE
  • CWE-639 - Authorization bypass through User-Controlled key
Assigner
INCIBE CNA under the INCIBE root
CNA scorecard B 85/100 over 132 records in the last 180 days details
Impacted products
Vendor Product Version
1millionbot Millie chat Affected: 3.6.0 (custom)
    cpe:2.3:a:1millionbot:millie_chat:3.6.0:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-4398 (GCVE-0-2026-4398)

Vulnerability from cvelistv5 – Published: 2026-08-27 17:53 – Updated: 2026-08-28 14:13
VLAI
Title
Authorization Bypass Through User-Controlled Key in GitLab
Summary
GitLab has remediated an issue in GitLab EE affecting all versions from 18.3 before 19.1.7, 19.2 before 19.2.5, and 19.3 before 19.3.1 that, under certain conditions, an authenticated user could have assigned compliance frameworks from namespaces they were not authorized to access to their own project, due to missing namespace validation on self-managed instances.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 13:58 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
GitLab CNA under the mitre root
CNA scorecard B 75/100 over 296 records in the last 180 days details
Impacted products
Vendor Product Version
GitLab GitLab Affected: 18.3 , < 19.1.7 (semver)
Affected: 19.2 , < 19.2.5 (semver)
Affected: 19.3 , < 19.3.1 (semver)
    cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
Create a notification for this product.
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CVE-2026-4330 (GCVE-0-2026-4330)

Vulnerability from cvelistv5 – Published: 2026-04-08 07:43 – Updated: 2026-04-08 17:32
VLAI
Title
Blog2Social: Social Media Auto Post & Scheduler <= 8.8.3 - Authenticated (Subscriber+) Insecure Direct Object Reference to Arbitrary Post Schedule Modification via 'b2s_id' Parameter
Summary
The Blog2Social: Social Media Auto Post & Scheduler plugin for WordPress is vulnerable to authorization bypass through user-controlled key in all versions up to, and including, 8.8.3. This is due to the plugin's AJAX handlers failing to validate that the user-supplied 'b2s_id' parameter belongs to the current user before performing UPDATE and DELETE operations. This makes it possible for authenticated attackers, with Subscriber-level access and above, to modify, reschedule, or delete other users' scheduled social media posts.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-08 14:18 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2362 records in the last 180 days details
Impacted products
Show details on NVD website

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CVE-2026-4208 (GCVE-0-2026-4208)

Vulnerability from cvelistv5 – Published: 2026-03-17 08:34 – Updated: 2026-03-24 17:20
VLAI
Title
Authentication Bypass in extension "E-Mail MFA Provider" (mfa_email)
Summary
The extension fails to properly reset the generated MFA code after successful authentication. This leads to a possible MFA bypass for future login attempts by providing an empty string as MFA code to the extensions MFA provider.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-17 13:16 UTC
CWE
Assigner
TYPO3 CNA under the mitre root
CNA scorecard B 83/100 over 67 records in the last 180 days details
Impacted products
Vendor Product Version
TYPO3 Extension "E-Mail MFA Provider" Affected: 0 , ≤ 1.0.5 (semver)
Affected: 2.0.0 (semver)
Create a notification for this product.
Date Public
2026-03-17 09:00
Show details on NVD website

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CVE-2026-4171 (GCVE-0-2026-4171)

Vulnerability from cvelistv5 – Published: 2026-03-15 08:02 – Updated: 2026-03-16 15:40
VLAI
Title
CodeGenieApp serverless-express API Endpoint TodoList.ts authorization
Summary
A security vulnerability has been detected in CodeGenieApp serverless-express up to 4.17.1. Affected by this issue is some unknown functionality of the file examples/lambda-function-url/packages/api/models/TodoList.ts of the component API Endpoint. The manipulation of the argument userId leads to authorization bypass. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-16 15:40 UTC
CWE
Assigner
VulDB CNA under the mitre root
CNA scorecard B 83/100 over 3788 records in the last 180 days details
References
URL Tags
https://vuldb.com/?id.351078 vdb-entrytechnical-description
https://vuldb.com/?ctiid.351078 signaturepermissions-required
https://vuldb.com/?submit.769769 third-party-advisory
https://vuldb.com/?submit.769771 third-party-advisory
https://github.com/AnalogyC0de/public_exp/issues/20 exploitissue-tracking
Impacted products
Vendor Product Version
CodeGenieApp serverless-express Affected: 4.17.0
Affected: 4.17.1
Create a notification for this product.
Show details on NVD website

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CVE-2026-4160 (GCVE-0-2026-4160)

Vulnerability from cvelistv5 – Published: 2026-04-16 13:27 – Updated: 2026-04-16 14:12
VLAI
Title
Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder <= 6.1.21 - Insecure Direct Object Reference in Stripe SCA Confirmation to Unauthenticated Payment Status Modification
Summary
The Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder plugin for WordPress is vulnerable to Insecure Direct Object Reference via the 'submission_id' parameter in versions up to, and including, 6.1.21. This is due to missing authorization and ownership validation on a user controlled key in the Stripe SCA confirmation AJAX endpoint. This makes it possible for unauthenticated attackers to modify payment status of targeted pending submissions (for example, setting the status to "failed").
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-16 14:12 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2362 records in the last 180 days details
Show details on NVD website

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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.