Common Weakness Enumeration

CWE-639

Allowed

Authorization Bypass Through User-Controlled Key

Abstraction: Base · Status: Incomplete

API response cwe.mitre.org

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.

3379 vulnerabilities reference this CWE, most recent first.

CVE-2026-55255 (GCVE-0-2026-55255)

Vulnerability from cvelistv5 – Published: 2026-06-23 16:28 – Updated: 2026-07-08 03:56
VLAI
Title
Langflow: IDOR Vulnerability in `/api/v1/responses` Endpoint Allows Authenticated Attackers to Access Another User's Flow
Summary
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.1, an Insecure Direct Object Reference (IDOR) vulnerability in /api/v1/responses endpoint allows an authenticated attacker to execute any flow belonging to another user by specifying the victim's flow ID in the request. This vulnerability is fixed in 1.9.1.
Severity
8.4 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L
SSVC
Exploitation: active 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
langflow-ai langflow Affected: < 1.9.1
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-55234 (GCVE-0-2026-55234)

Vulnerability from cvelistv5 – Published: 2026-07-15 21:13 – Updated: 2026-07-16 15:12
VLAI
Title
Wekan: Broken access control: any authenticated user can move their Cards/Lists/Swimlanes into a private board they are not a member of (cross-board write via collection allow rule)
Summary
Wekan is open source kanban built with Meteor. Prior to 9.37, Wekan DDP update allow rules in server/permissions/cards.js, server/permissions/lists.js, and server/permissions/swimlanes.js authorize against the stored source boardId and do not validate a new boardId in the update modifier. Any authenticated user with write access to their own board can call /cards/update, /lists/update, or /swimlanes/update to move cards, lists, or swimlanes into a private board they are not a member of. This issue is fixed in version 9.37.
Severity
8.5 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-284 - Improper Access Control
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
wekan wekan Affected: < 9.37
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-55198 (GCVE-0-2026-55198)

Vulnerability from cvelistv5 – Published: 2026-06-17 17:59 – Updated: 2026-07-14 21:33 X_Open Source
VLAI
Title
Hermes WebUI < 0.51.443 - Cross-Profile Session Data Exfiltration via Session Export Endpoint
Summary
Hermes WebUI before 0.51.443 contains an authorization bypass vulnerability in the session export endpoint that allows authenticated users to access sessions from other profiles. The _handle_session_export handler in api/routes.py fails to verify active-profile ownership before serializing session data, enabling attackers to exfiltrate foreign session transcripts by guessing or knowing session identifiers.
Severity
7.1 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
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
nesquena hermes-webui Affected: 0 , < 0.51.443 (semver)
Unaffected: 0.51.443 (semver)
Create a notification for this product.
Date Public
2026-06-11 00:00
Credits
Chia Min Jun Lennon
Show details on NVD website
To clipboard 

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CVE-2026-55197 (GCVE-0-2026-55197)

Vulnerability from cvelistv5 – Published: 2026-06-17 17:59 – Updated: 2026-07-14 21:33 X_Open Source
VLAI
Title
Hermes WebUI < 0.51.443 - Broken Access Control in /api/session Endpoint
Summary
Hermes WebUI before 0.51.443 contains a broken access control vulnerability in the /api/session endpoint that allows authenticated users to disclose cross-profile session transcripts. Attackers can bypass profile boundary checks by directly querying session IDs belonging to other profiles via GET /api/session?session_id=<foreign_id>&messages=1 to retrieve unauthorized conversation transcripts and metadata.
Severity
7.1 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
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
nesquena hermes-webui Affected: 0 , < 0.51.443 (semver)
Unaffected: 0.51.443 (semver)
Create a notification for this product.
Date Public
2026-06-11 00:00
Credits
Chia Min Jun Lennon
Show details on NVD website
To clipboard 

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CVE-2026-54839 (GCVE-0-2026-54839)

Vulnerability from cvelistv5 – Published: 2026-06-26 14:52 – Updated: 2026-06-26 17:06
VLAI
Title
WordPress Trinity Backup – Backup, Migrate, Restore, Clone & Schedule Backups plugin <= 2.0.9 - Sensitive Data Exposure vulnerability
Summary
Unauthenticated Sensitive Data Exposure in Trinity Backup &#8211; Backup, Migrate, Restore, Clone &amp; Schedule Backups <= 2.0.9 versions.
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: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Credits
dodoh4t | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-54826 (GCVE-0-2026-54826)

Vulnerability from cvelistv5 – Published: 2026-06-26 14:52 – Updated: 2026-06-29 17:38
VLAI
Title
WordPress SupportCandy plugin <= 3.4.6 - Insecure Direct Object References (IDOR) vulnerability
Summary
Subscriber Insecure Direct Object References (IDOR) in SupportCandy <= 3.4.6 versions.
Severity
7.6 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L
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
PSM Plugins SupportCandy Affected: n/a , ≤ 3.4.6 (custom)
Create a notification for this product.
Credits
HieuPenguinnn | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-54602 (GCVE-0-2026-54602)

Vulnerability from cvelistv5 – Published: 2026-07-07 21:24 – Updated: 2026-07-08 13:47
VLAI
Title
FastGPT: Cross-team LLM request/response disclosure (IDOR) via /api/core/ai/record/getRecord
Summary
FastGPT is a knowledge-based AI application platform. Prior to 4.15.0, GET /api/core/ai/record/getRecord authenticates the caller but loads LLM request and response traces only by requestId without team scoping, allowing any authenticated user to read another team's prompts, retrieved RAG chunks, and completions if the requestId is known. This issue is fixed in version 4.15.0.
Severity
7.1 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/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
labring FastGPT Affected: < 4.15.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-54590 (GCVE-0-2026-54590)

Vulnerability from cvelistv5 – Published: 2026-07-08 20:36 – Updated: 2026-07-10 15:00
VLAI
Title
AsyncSSH AuthorizedKeysFile username substitution bypass through ~ and environment expansion
Summary
AsyncSSH is a Python package which provides an asynchronous client and server implementation of the SSHv2 protocol on top of the Python asyncio framework. Version 2.23.0 contains an incomplete fix for CVE-2026-45309 in SSHServerConfig._set_tokens that blocks /, , and .. before %u substitution in AuthorizedKeysFile but does not block a leading ~ or ${ENV}, allowing later expansion in _expand_val and Path(filename).expanduser() to escape the intended authorized-keys directory. This issue is fixed in version 2.23.1.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
ronf asyncssh Affected: < 2.23.1
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-54568 (GCVE-0-2026-54568)

Vulnerability from cvelistv5 – Published: 2026-07-16 15:32 – Updated: 2026-07-16 18:03
VLAI
Title
Microsoft UFO: Missing Authorization in DEVICE_INFO_REQUEST Allows a DEVICE Client to Read Another Device's system_info
Summary
Microsoft UFO open-source framework for intelligent automation across devices and platforms. From 3.0.0 until 3.0.6, a client connected to the UFO WebSocket server as a DEVICE could call DEVICE_INFO_REQUEST with another device's target_id and receive that device's server-side system_info through ufo/server/ws/handler.py, because handle_device_info_request and get_device_info did not enforce the constellation-only role or object-level authorization boundary. This issue is fixed in version 3.0.6.
Severity
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/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
microsoft UFO Affected: >= 3.0.0, < 3.0.6
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-54361 (GCVE-0-2026-54361)

Vulnerability from cvelistv5 – Published: 2026-06-12 19:59 – Updated: 2026-06-15 18:20
VLAI
Title
MISP mass assignment vulnerabilities allow unauthorized modification of ownership and delegation records
Summary
MISP contained multiple mass assignment vulnerabilities in the handling of collections, tag collections, event delegations, and shadow attributes. Several controller actions accepted user-supplied fields that should have remained server-controlled, including record identifiers and ownership-related fields such as id, org_id, orgc_id, and user_id. An authenticated attacker with access to the affected endpoints could craft requests containing protected fields in order to alter object ownership, redirect an update to another record, overwrite existing event delegation requests, or modify shadow attribute proposals belonging to another organization. This could result in unauthorized modification of MISP objects and, depending on object visibility and sharing configuration, unauthorized access to or transfer of sensitive threat intelligence data. The issue was fixed by explicitly pinning ownership and identity fields to their stored values during edit operations and by removing user-supplied primary keys from create-only save paths. Affected components: * CollectionsController::edit() * EventDelegationsController::delegateEvent() * ShadowAttributesController::edit() * TagCollectionsController::edit()915 * TagCollectionsController::editWithTags() Attack requirements: The attacker must be authenticated and able to reach the affected MISP endpoints. No user interaction is required.
Severity
8.8 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:L/SI:L/SA: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
misp misp Affected: 0 , < 2.5.40 (semver)
Create a notification for this product.
Credits
🕵️‍♂️ Jeroen Pinoy 🐞 Andras Iklody (the Insomniac MISP lead dev)
Show details on NVD website
To clipboard 

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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.

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