Common Weakness Enumeration

CWE-639

Authorization Bypass Through User-Controlled Key

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.

CVE-2026-33304 (GCVE-0-2026-33304)

Vulnerability from cvelistv5 – Published: 2026-03-19 20:27 – Updated: 2026-03-20 19:27
VLAI
Title
OpenEMR has Authorization Bypass in Dated Reminders Log
Summary
OpenEMR is a free and open source electronic health records and medical practice management application. Prior to 8.0.0.2, an authorization bypass in the dated reminders log allows any authenticated non-admin user to view reminder messages belonging to other users, including associated patient names and free-text message content, by crafting a GET request with arbitrary user IDs in the `sentTo[]` or `sentBy[]` parameters. Version 8.0.0.2 fixes the issue.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
  • CWE-862 - Missing Authorization
Assigner
References
Impacted products
Vendor Product Version
openemr openemr Affected: < 8.0.0.2
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-33313 (GCVE-0-2026-33313)

Vulnerability from cvelistv5 – Published: 2026-03-24 14:50 – Updated: 2026-03-24 17:14
VLAI
Title
Vikunja has an IDOR in Task Comments Allows Reading Arbitrary Comments
Summary
Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.0, an authenticated user can read any task comment by ID, regardless of whether they have access to the task the comment belongs to, by substituting the task ID in the API URL with a task they do have access to. Version 2.2.0 fixes the issue.
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
go-vikunja vikunja Affected: < 2.2.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-33345 (GCVE-0-2026-33345)

Vulnerability from cvelistv5 – Published: 2026-03-24 19:30 – Updated: 2026-03-25 13:21
VLAI
Title
solidtime vulnerable to IDOR in private projects
Summary
solidtime is an open-source time-tracking app. Prior to version 0.11.6, the project detail endpoint GET /api/v1/organizations/{org}/projects/{project} allows any authenticated Employee to access any project in the organization by UUID, including private projects they are not a member of. The index() endpoint correctly applies the visibleByEmployee() scope, but show() does not. This issue has been patched in version 0.11.6.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
solidtime-io solidtime Affected: < 0.11.6
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-33356 (GCVE-0-2026-33356)

Vulnerability from cvelistv5 – Published: 2026-05-11 16:02 – Updated: 2026-05-11 18:18
VLAI
Title
Meari MQTT broker missing per-device subscribe ACL
Summary
In Meari IoT Cloud MQTT Broker deployments running EMQX 4.x, any authenticated low-privilege account can subscribe to global wildcard topics and receive telemetry from devices the user does not own. The broker enforces publish restrictions but does not enforce equivalent subscribe authorization at per-device scope.
Severity
7.7 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
Meari IoT Cloud MQTT Broker EMQX Affected: 4.x (custom)
Create a notification for this product.
Date Public
2026-05-11 16:00
Credits
Sammy Azdoufal Tod Beardsley of runZero, Inc.
Show details on NVD website
To clipboard 

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CVE-2026-33425 (GCVE-0-2026-33425)

Vulnerability from cvelistv5 – Published: 2026-03-20 23:12 – Updated: 2026-03-23 16:48
VLAI
Title
Discourse has inferable private group membership or existence via exclude_groups parameter
Summary
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, unauthenticated users can determine whether a specific user is a member of a private group by observing changes in directory results when using the `exclude_groups` parameter. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. As a workaround, disable public access to the user directory via Admin → Settings → hide user profiles from public.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-203 - Observable Discrepancy
  • CWE-639 - Authorization Bypass Through User-Controlled Key
  • CWE-862 - Missing Authorization
Assigner
References
Impacted products
Vendor Product Version
discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.2
Affected: >= 2026.2.0-latest, < 2026.2.1
Affected: = 2026.3.0-latest
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CVE-2026-33484 (GCVE-0-2026-33484)

Vulnerability from cvelistv5 – Published: 2026-03-24 12:57 – Updated: 2026-03-24 13:37
VLAI
Title
Langflow has Unauthenticated IDOR on Image Downloads
Summary
Langflow is a tool for building and deploying AI-powered agents and workflows. In versions 1.0.0 through 1.8.1, the `/api/v1/files/images/{flow_id}/{file_name}` endpoint serves image files without any authentication or ownership check. Any unauthenticated request with a known flow_id and file_name returns the image with HTTP 200. In a multi-tenant deployment, any attacker who can discover or guess a `flow_id` (UUIDs can be leaked through other API responses) can download any user's uploaded images without credentials. Version 1.9.0 contains a patch.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-284 - Improper Access Control
  • CWE-639 - Authorization Bypass Through User-Controlled Key
  • CWE-862 - Missing Authorization
Assigner
References
Impacted products
Vendor Product Version
langflow-ai langflow Affected: >= 1.0.0, < 1.9.0
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CVE-2026-33511 (GCVE-0-2026-33511)

Vulnerability from cvelistv5 – Published: 2026-03-24 18:56 – Updated: 2026-03-25 14:28
VLAI
Title
pyload-ng: Authentication Bypass via Host Header Injection in ClickNLoad
Summary
pyLoad is a free and open-source download manager written in Python. From version 0.4.20 to before version 0.5.0b3.dev97, the local_check decorator in pyLoad's ClickNLoad feature can be bypassed by any remote attacker through HTTP Host header spoofing. This allows unauthenticated remote users to access localhost-restricted endpoints, enabling them to inject arbitrary downloads, write files to the storage directory, and execute JavaScript code. This issue has been patched in version 0.5.0b3.dev97.
Severity
8.8 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:L/SA:N
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
pyload pyload Affected: >= 0.4.20, < 0.5.0b3.dev97
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CVE-2026-33663 (GCVE-0-2026-33663)

Vulnerability from cvelistv5 – Published: 2026-03-25 17:11 – Updated: 2026-03-25 18:06
VLAI
Title
n8n Vulnerable to Credential Theft via Name-Based Resolution and Permission Checker Bypass in Community Edition
Summary
n8n is an open source workflow automation platform. Prior to versions 2.14.1, 2.13.3, and 1.123.27, an authenticated user with the `global:member` role could exploit chained authorization flaws in n8n's credential pipeline to steal plaintext secrets from generic HTTP credentials (`httpBasicAuth`, `httpHeaderAuth`, `httpQueryAuth`) belonging to other users on the same instance. The attack abuses a name-based credential resolution path that does not enforce ownership or project scope, combined with a bypass in the credentials permission checker that causes generic HTTP credential types to be skipped during pre-execution validation. Together, these flaws allow a member-role user to resolve another user's credential ID and execute a workflow that decrypts and uses that credential without authorization. Native integration credential types (e.g. `slackApi`, `openAiApi`, `postgres`) are not affected by this issue. This vulnerability affects Community Edition only. Enterprise Edition has additional permission gates on workflow creation and execution that independently block this attack chain. The issue has been fixed in n8n versions 1.123.27, 2.13.3, and 2.14.1. Users should upgrade to one of these versions or later to remediate the vulnerability. If upgrading is not immediately possible, administrators should consider the following temporary mitigations: Restrict instance access to fully trusted users only, and/or audit credentials stored on the instance and rotate any generic HTTP credentials (`httpBasicAuth`, `httpHeaderAuth`, `httpQueryAuth`) that may have been exposed. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
Severity
8.5 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
n8n-io n8n Affected: < 1.123.27
Affected: >= 2.0.0-rc.0, < 2.13.3
Affected: = 2.14.0
Create a notification for this product.
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CVE-2026-33678 (GCVE-0-2026-33678)

Vulnerability from cvelistv5 – Published: 2026-03-24 15:44 – Updated: 2026-03-24 17:04
VLAI
Title
Vikunja has IDOR in Task Attachment ReadOne Allows Cross-Project File Access and Deletion
Summary
Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, `TaskAttachment.ReadOne()` queries attachments by ID only (`WHERE id = ?`), ignoring the task ID from the URL path. The permission check in `CanRead()` validates access to the task specified in the URL, but `ReadOne()` loads a different attachment that may belong to a task in another project. This allows any authenticated user to download or delete any attachment in the system by providing their own accessible task ID with a target attachment ID. Attachment IDs are sequential integers, making enumeration trivial. Version 2.2.1 patches the issue.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
go-vikunja vikunja Affected: < 2.2.1
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-33700 (GCVE-0-2026-33700)

Vulnerability from cvelistv5 – Published: 2026-03-24 15:51 – Updated: 2026-03-24 18:04
VLAI
Title
Vikunja has a Link Share Delete IDOR — Missing Project Ownership Check Allows Cross-Project Link Share Deletion
Summary
Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the `DELETE /api/v1/projects/:project/shares/:share` endpoint does not verify that the link share belongs to the project specified in the URL. An attacker with admin access to any project can delete link shares from other projects by providing their own project ID combined with the target share ID. Version 2.2.1 patches the issue.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
go-vikunja vikunja Affected: < 2.2.1
Create a notification for this product.
Show details on NVD website
To clipboard 

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Mitigation

Phase: Architecture and Design

Description:

  • For each and every data access, ensure that the user has sufficient privilege to access the record that is being requested.
Mitigation

Phases: Architecture and Design, Implementation

Description:

  • 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

Phase: Architecture and Design

Description:

  • 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.

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