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.

4685 vulnerabilities reference this CWE, most recent first.

CVE-2026-106100 (GCVE-0-2026-106100)

Vulnerability from cvelistv5 – Published: 2026-10-06 16:56 – Updated: 2026-10-06 17:28
VLAI
Title
Payload: Field-level write access bypass in Payload on MongoDB
Summary
Payload is a free and open source headless content management system. In @payloadcms/db-mongodb versions before 3.87.0 and canary versions before 4.0.0-canary.20, an authenticated user who can update a document can modify fields that field-level write access control does not permit that user to change. The Postgres and SQLite adapters are not affected. This issue is fixed in versions 3.87.0 and 4.0.0-canary.20.
Severity
7.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-06 17:28 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
  • CWE-915 - Improperly Controlled Modification of Dynamically-Determined Object Attributes
Assigner
References
Impacted products
Vendor Product Version
payloadcms payload Affected: < 3.87.0
Affected: >= 4.0.0-canary.0, < 4.0.0-canary.20
Create a notification for this product.
Show details on NVD website
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CVE-2026-105867 (GCVE-0-2026-105867)

Vulnerability from cvelistv5 – Published: 2026-10-06 16:49 – Updated: 2026-10-06 17:24
VLAI
Title
Payload: Client uploads could overwrite S3 objects
Summary
Payload is a free and open source headless content management system. In @payloadcms/storage-s3 versions before 3.90.0 and canary versions before 4.0.0-canary.34, an authenticated user can overwrite an existing S3 object belonging to another upload collection when client uploads are enabled for multiple collections sharing a bucket and useCompositePrefixes is false or unset. This bypasses the target collection's access controls and prior file validation. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.
Severity
7.1 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-06 17:24 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
payloadcms payload Affected: < 3.90.0
Affected: >= 4.0.0-canary.0, < 4.0.0-canary.34
Create a notification for this product.
@payloadcms storage-s3 Affected: < 3.90.0
Affected: >= 4.0.0-canary.0, < 4.0.0-canary.34
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-105859 (GCVE-0-2026-105859)

Vulnerability from cvelistv5 – Published: 2026-10-06 16:31 – Updated: 2026-10-06 17:37
VLAI
Title
Payload: Unauthorized update to collection documents
Summary
Payload is a free and open source headless content management system. In versions before 3.90.0 and canary versions before 4.0.0-canary.34, an attacker can submit a request to a specific update endpoint that modifies collection documents without enforcing collection or field-level access control when orderable is enabled on a collection or join field. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-06 17:37 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
  • CWE-862 - Missing Authorization
Assigner
References
Impacted products
Vendor Product Version
payloadcms payload Affected: < 3.90.0
Affected: >= 4.0.0-canary.0, < 4.0.0-canary.34
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-105847 (GCVE-0-2026-105847)

Vulnerability from cvelistv5 – Published: 2026-10-06 16:02 – Updated: 2026-10-06 17:22
VLAI
Title
Payload: Polymorphic join queries could disclose hidden fields
Summary
Payload is a free and open source headless content management system. In versions from 3.0.0 before 3.90.0 and canary versions before 4.0.0-canary.34, a user who can query a collection with a polymorphic join to sensitive fields can infer hidden or read-restricted values, including password-reset tokens, through polymorphic join filters. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.
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 · CISA-ADP (v2.0.3)
Decision recorded 2026-10-06 17:22 UTC
CWE
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
payloadcms payload Affected: >= 3.0.0, < 3.90.0
Affected: >= 4.0.0-canary.0, < 4.0.0-canary.34
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-105836 (GCVE-0-2026-105836)

Vulnerability from cvelistv5 – Published: 2026-10-06 12:57 – Updated: 2026-10-06 13:37
VLAI
Title
QloApps through 1.7.0 Authorization Bypass via ajaxProcessBulkUpdateRooms
Summary
QloApps through 1.7.0 contains an authorization bypass vulnerability in AdminProductsController::ajaxProcessBulkUpdateRooms that allows hotel-restricted back-office employees to modify rooms of other hotels. Attackers can submit foreign room IDs in the id_rooms parameter to change status, floor, comments, or inactive dates, disrupting availability and bookings.
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
Webkul QloApps Affected: 0 , ≤ 1.7.0 (custom)
    cpe:2.3:a:webkul:qloapps:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-09-30 00:00
Credits
leediay153 from Viettel Post
Show details on NVD website
To clipboard 

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CVE-2026-105811 (GCVE-0-2026-105811)

Vulnerability from cvelistv5 – Published: 2026-10-06 20:03 – Updated: 2026-10-06 20:03
VLAI
Title
Authorization bypass through a user-controlled key in the Amazon Q Business Lambda hook sample in QnABot on AWS
Summary
Authorization bypass through a user-controlled key in the optional Amazon Q Business Lambda hook sample ( q-business-lambda-hook https://github.com/aws-solutions-library-samples/qnabot-on-aws/blob/main/source/docs/lambda_hooks/README.md ), available with QnABot on AWS versions 7.0.0 through 7.4.5, might allow an authenticated remote user to read arbitrary Amazon S3 objects in the deploying AWS account. This sample solution provides an example Lambda hook and requires separate, manual deployment and additional setup. It is not deployed automatically with QnABot. Customers who have not deployed this optional sample hook are not affected and do not need to take action. To remediate this issue, affected customers should update the QnABot on AWS stack to version 7.4.6 or later and then redeploy the Amazon Q Business Lambda hook sample stack. Updating the QnABot on AWS stack alone does not deliver the fix.
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
CWE
  • CWE-639 - Authorization bypass through User-Controlled key
Assigner
References
Impacted products
Vendor Product Version
aws qnabot-on-aws Affected: 7.0.0 , < 7.4.6 (custom)
    cpe:2.3:a:aws:qnabot-on-aws:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-105761 (GCVE-0-2026-105761)

Vulnerability from cvelistv5 – Published: 2026-10-05 23:03 – Updated: 2026-10-06 14:47
VLAI
Title
Dify: IDOR in AppMCPServer PUT Endpoint Allows Modification of Other Apps' MCP Servers
Summary
Dify is an open-source LLM app development platform. Prior to 1.16.0, the PUT /console/api/apps/<app_id>/server endpoint in api/controllers/console/app/mcp_server.py used AppMCPServerController.put() to retrieve an AppMCPServer by the client-supplied server ID without verifying that the server belonged to the requested application and tenant. An authenticated workspace member could therefore change another application's MCP server status and parameters, potentially redirecting data or disabling the service. This issue is fixed in version 1.16.0.
Severity
7.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-06 14:34 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
langgenius dify Affected: < 1.16.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-105755 (GCVE-0-2026-105755)

Vulnerability from cvelistv5 – Published: 2026-10-05 22:47 – Updated: 2026-10-06 17:55
VLAI
Title
vLLM: Flash late-interaction scoring caches query embeddings under a caller-controlled request id — cross-request integrity break and induced errors on `/score` and `/rerank`
Summary
vLLM is an inference and serving engine for large language models. Prior to 0.30.0, flash late-interaction scoring at the /score and /rerank endpoints derives each worker's query_key value from the caller-controlled X-Request-Id header. A concurrent request that reuses a victim's identifier can overwrite the cached query embedding so the victim's documents are scored against the attacker's query, and shared use counters can also cause a late-interaction cache-miss error. This issue is fixed in version 0.30.0.
Severity
4.2 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-06 17:55 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
vllm-project vllm Affected: < 030.0
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                "id": "CVE-2026-105755",
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CVE-2026-105754 (GCVE-0-2026-105754)

Vulnerability from cvelistv5 – Published: 2026-10-05 22:46 – Updated: 2026-10-05 22:46
VLAI
Title
vLLM: Scale-out disaggregated multimodal transport trusts caller-supplied features
Summary
vLLM is an inference and serving engine for large language models. Prior to 0.30.0, the /inference/v1/generate endpoint in the disaggregated scale-out path accepts caller-supplied tensors in the features.kwargs_data field, cache identifiers in the features.mm_hashes field, ranges in the features.mm_placeholders field, and wire-selected multimodal field processors without rebinding them to the active model renderer contract. Forged grid geometry, field types, or non-positive placeholder lengths can terminate the shared EngineCore; when an attacker knows or can induce a victim's content hash, forged cache hashes can poison or retrieve cross-request encoder-cache state; and dropped sparse placeholder masks can alter replayed transport semantics. This issue is fixed in version 0.30.0.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-20 - Improper Input Validation
  • CWE-617 - Reachable Assertion
  • CWE-639 - Authorization Bypass Through User-Controlled Key
  • CWE-668 - Exposure of Resource to Wrong Sphere
  • CWE-704 - Incorrect Type Conversion or Cast
  • CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
References
Impacted products
Vendor Product Version
vllm-project vllm Affected: < 0.30.0
Create a notification for this product.
Show details on NVD website
To clipboard 

{
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CVE-2026-105699 (GCVE-0-2026-105699)

Vulnerability from cvelistv5 – Published: 2026-10-05 20:37 – Updated: 2026-10-05 20:37
VLAI
Title
Langflow: Authenticated Cross-Project File Disclosure via Unscoped MCP Resource Handlers
Summary
Langflow is a tool for building and deploying AI-powered agents and workflows. From 1.6.8 until 1.9.1, Langflow authenticated access to the project identifier in a project-scoped MCP connection but did not authorize the resource URI supplied to resources/read. read_resource forwarded the attacker-controlled URI to handle_read_resource, which parsed a flow_id and filename and called storage_service.get_file without verifying that the flow belonged to the authenticated user or current project. A user with access to any project-scoped MCP endpoint could therefore request another user's flow-backed file, while global handle_list_resources and handle_list_tools behavior could disclose flow and file identifiers that made targeting easier. The vulnerability disclosed uploaded documents, structured data, prompts, and other private flow artifacts across tenants but did not modify victim files or stored flows. This issue is fixed in version 1.9.1.
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
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
langflow-ai langflow Affected: >= 1.6.8, <= 1.9.0
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "langflow",
          "vendor": "langflow-ai",
          "versions": [
            {
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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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