Weakness (CWE)
CWE-306: Missing Authentication for Critical Functionality
The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
How to prevent it (5 mitigations)
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Architecture and Design
Divide the software into anonymous, normal, privileged, and administrative areas. Identify which of these areas require a proven user identity, and use a centralized authentication capability.
Identify all potential communication channels, or other means of interaction with the software, to ensure that all channels are appropriately protected, including those channels that are assumed to be accessible only by authorized parties. Developers sometimes perform authentication at the primary channel, but open up a secondary channel that is assumed to be private. For example, a login mechanism may be listening on one network port, but after successful authentication, it may open up a second port where it waits for the connection, but avoids authentication because it assumes that only the authenticated party will connect to the port.
In general, if the software or protocol allows a single session or user state to persist across multiple connections or channels, authentication and appropriate credential management need to be used throughout.
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Architecture and Design
For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
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Architecture and Design
Where possible, avoid implementing custom, "grow-your-own" authentication routines and consider using authentication capabilities as provided by the surrounding framework, operating system, or environment. These capabilities may avoid common weaknesses that are unique to authentication; support automatic auditing and tracking; and make it easier to provide a clear separation between authentication tasks and authorization tasks.
In environments such as the World Wide Web, the line between authentication and authorization is sometimes blurred. If custom authentication routines are required instead of those provided by the server, then these routines must be applied to every single page, since these pages could be requested directly.
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Architecture and Design
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
For example, consider using libraries with authentication capabilities such as OpenSSL or the ESAPI Authenticator [REF-45].
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Implementation, System Configuration, Operation
When storing data in the cloud (e.g., S3 buckets, Azure blobs, Google Cloud Storage, etc.), use the provider's controls to require strong authentication for users who should be allowed to access the data [REF-1297] [REF-1298] [REF-1302].
Source: MITRE CWE-306
230 results · Clear filters · Feed
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Medium 6.9CVE-2026-53647 Public exploit
FOSSBilling vulnerable to unauthenticated API key configuration disclosure via guest Serviceapikey get_info endpoint
FOSSBilling is a free, open-source billing and client management system. In versions 0.5.3 through 0.7.2, the Guest `serviceapikey/get_info` API endpoint is accessible without authentication. Any caller with a valid API key can retrieve all custom configurati…
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Critical 9.8CVE-2026-53913 Public exploit
Apache Camel Keycloak: KeycloakSecurityPolicy verifies the bearer access token only inside its role and permission checks, so in the default configuration the token is never verified and any non-null bearer value is accepted
Improper Authentication, Missing Authentication for Critical Function, Not Failing Securely ('Failing Open') vulnerability in Apache Camel Keycloak Component. The KeycloakSecurityPolicy of camel-keycloak guards a route by running KeycloakSecurityProcessor.bef…
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Critical 9.8CVE-2026-56782 Public exploit
Gorse - Unauthenticated Database Dump and Restore via /api/dump and /api/restore Endpoints
Gorse before 0.5.10 contains an authentication bypass vulnerability in the /api/dump and /api/restore endpoints that allows unauthenticated attackers to access protected functionality when admin_api_key is empty, which is the default configuration. Remote att…
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Critical 9.3CVE-2026-54088 Public exploit
File Browser: Command Injection via Authentication Hook Shell Substitution (Pre-Authentication RCE)
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.6, the Hook Authentication feature in File Browser allows administrators to delegate login verification to a…
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Critical 9.3CVE-2026-55450 Public exploit
Langflow: Unauthenticated file upload leads to DoS (space exhaustion) and information leak
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.1, unauthenticated users can upload any amount of data to the server without any limitations. No need for any prior knowledge, only network access to Langflow. This ca…
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Critical 9.8
Vulnerability in the PeopleSoft Enterprise PeopleTools product of Oracle PeopleSoft (component: Updates Environment Man…
KEV Jun 12, 2026 -
Critical 9.8
Unauthenticated Arbitrary File Creation and Truncation in a PostgreSQL Sidecar Service Endpoint in Splunk Enterprise
In Splunk Enterprise 10.2 versions below 10.2.4 and 10 versions below 10.0.7, an unauthenticated user could create or truncate arbitrary files through a PostgreSQL sidecar service endpoint. The vulnerability exists because the PostgreSQL sidecar service endpo…
KEV Jun 18, 2026 -
Medium 6.8CVE-2026-50507 Public exploit
Windows BitLocker Security Feature Bypass Vulnerability
Missing authentication for critical function in Windows BitLocker allows an unauthorized attacker to bypass a security feature with a physical attack.
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Critical 9.8CVE-2026-6274 Public exploit
Authentication Bypass in DTS Electronics' Redline WR3200
Improper Authentication, Missing authentication for critical function, Weak Authentication vulnerability in DTS Electronics Industry and Trade Ltd. Co. Redline WR3200 allows Accessing Functionality Not Properly Constrained by ACLs. This issue affects Redline …
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High 7.1CVE-2026-24090 Public exploit
Missing Authentication for Critical Function in HLOS
Cryptographic issue while processing partition table entries allows unauthorized modification of boot flow.
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High 8.2CVE-2026-24088 Public exploit
Missing Authentication for Critical Function in Boot
Cryptographic Issue while processing a specific partition which allows unauthorized write access to load a customized bootloader.
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High 7.3CVE-2026-10243 Public exploit
code-projects Smart Parking System Admin Endpoint missing authentication
A security vulnerability has been detected in code-projects Smart Parking System 1.0. Affected is an unknown function of the component Admin Endpoint. Such manipulation leads to missing authentication. It is possible to launch the attack remotely. The exploit…
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Critical 9.8
WP Maps Pro <= 6.1.0 - Unauthenticated Privilege Escalation via Administrator Account Creation to wpgmp_temp_access_ajax AJAX Action
The WP Maps Pro plugin for WordPress is vulnerable to Privilege Escalation via Administrator Account Creation in all versions up to, and including, 6.1.0. This is due to the wpgmp_temp_access_ajax AJAX action being registered with wp_ajax_nopriv_ and protecte…
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Critical 9.8
Vulnerability in the Oracle Payments product of Oracle E-Business Suite (component: File Transmission). Supported versi…
KEV Jul 15, 2026 -
High 7.5CVE-2026-45332 Public exploit
Automad Broken Access Control: unauthenticated exposure of administrator bcrypt password hashes and TOTP secrets via public API endpoint
Automad is a flat-file content management system and template engine. From 2.0.0-alpha.1 to 2.0.0-beta.27, a Broken Access Control vulnerability allows an unauthenticated attacker to retrieve the bcrypt password hash of every administrator account with a sing…
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Critical 10.0CVE-2026-45087 Public exploit
Dalfox: Unauthenticated Remote Code Execution via `found-action` in Dalfox Server Mode
Dalfox is a powerful open-source XSS scanner and utility focused on automation. Prior to 2.13.0, when dalfox is started in REST API server mode (dalfox server), the server binds to 0.0.0.0:6664 by default and requires no API key unless the operator explicitly…
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Critical 10.0CVE-2026-20223 Public exploit
Cisco Secure Workload Unauthorized API Access Vulnerability
A vulnerability in the access validation of internal REST APIs of Cisco Secure Workload could allow an unauthenticated, remote attacker to access site resources with the privileges of the Site Admin role. This vulnerability is due to insufficient va…
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High 8.7CVE-2026-5029 Public exploit
RCE in Code Runner MCP Server
A remote code execution vulnerability exists in Code Runner MCP Server when run with the --transport http option, which exposes the /mcp JSON-RPC endpoint without authentication on port 3088. An unauthenticated remote attacker can invoke the run-code MCP tool…
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Critical 9.4CVE-2026-42569 Public exploit
phpvms: /importer authorization bypass causing full database wipe
phpVMS is a PHP application to run and simulate an airline. Prior to version 7.0.6, a critical vulnerability in phpVMS allowed unauthenticated access to a legacy import feature. This issue has been patched in version 7.0.6.
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High 7.3
PraisonAI ships and generates a legacy API server with authentication disabled by default, allowing unauthenticated workflow execution
PraisonAI is a multi-agent teams system. From version 2.5.6 to before version 4.6.34, PraisonAI ships a legacy Flask API server with authentication disabled by default. When that server is used, any caller that can reach it can access /agents and trigger the …
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Critical 9.1
The GoAhead web server on MeiG Smart FORGE_SLT711 devices (firmware MDM9607.LE.1.0-00110-STD.PROD-1) allows unauthentic…
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High 8.1CVE-2026-42221 Public exploit
nginx-ui: Unauthenticated First-Run Installer Allows Remote Initial Admin Claim
Nginx UI is a web user interface for the Nginx web server. From version 2.0.0 to before version 2.3.8, an unauthenticated network attacker can claim the initial administrator account on a fresh nginx-ui instance during the first-run setup window. The public /…
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Critical 9.8CVE-2026-42796 Public exploit
Arelle < 2.39.10 Unauthenticated RCE via /rest/configure
Arelle before 2.39.10 contains an unauthenticated remote code execution vulnerability in the /rest/configure REST endpoint that accepts a plugins query parameter and forwards it to the plugin manager without authentication or authorization. Attackers can supp…
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Critical 9.8
WebPros cPanel and WHM Authentication Bypass via Login Flow
cPanel and WHM versions after 11.40 contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.
KEV Apr 30, 2026 -
High 8.8CVE-2026-41473 Public exploit
CyberPanel < 2.4.5 Unauthenticated API Access via AI Scanner Endpoints
CyberPanel versions prior to 2.4.5 contain an authentication bypass vulnerability in the AI Scanner worker API endpoints that allows unauthenticated remote attackers to write arbitrary data to the database by sending requests to the /api/ai-scanner/status-web…
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Critical 9.8CVE-2026-23751 Public exploit
Kofax Capture 6.0.0.0 Unauthenticated File Read/Write & SMB Coercion via .NET Remoting
Kofax Capture, now referred to as Tungsten Capture, version 6.0.0.0 (other versions may be affected) exposes a deprecated .NET Remoting HTTP channel on port 2424 via the Ascent Capture Service that is accessible without authentication and uses a default, publ…
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Critical 9.2CVE-2026-41179 Public exploit
RClone: Unauthenticated operations/fsinfo allows attacker-controlled backend instantiation and local command execution
Rclone is a command-line program to sync files and directories to and from different cloud storage providers. Starting in version 1.48.0 and prior to version 1.73.5, the RC endpoint `operations/fsinfo` is exposed without `AuthRequired: true` and accepts attac…
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High 8.6CVE-2026-34160 Public exploit
Chamilo LMS: Unauthenticated SSRF via PENS Plugin allows attacker to probe internal network and reach cloud metadata services
Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, the PENS (Package Exchange Notification Services) plugin endpoint at public/plugin/Pens/pens.php is accessible without authentication and accepts a user-controlled pack…
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High 7.2CVE-2026-33715 Public exploit
Chamilo LMS has Unauthenticated SSRF and Open Email Relay via install.ajax.php test_mailer action
Chamilo LMS is an open-source learning management system. In version 2.0-RC.2, the file public/main/inc/ajax/install.ajax.php is accessible without authentication on fully installed instances because, unlike other AJAX endpoints, it does not include the globa…
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Medium 6.3CVE-2026-5724 Public exploit
Missing Authentication on Streaming gRPC Replication Endpoint
The frontend gRPC server's streaming interceptor chain did not include the authorization interceptor. When a ClaimMapper and Authorizer are configured, unary RPCs enforce authentication and authorization, but the streaming AdminService/StreamWorkflowReplicati…
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Critical 9.3
marimo Affected by Pre-Auth Remote Code Execution via Terminal WebSocket Authentication Bypass
marimo is a reactive Python notebook. Prior to 0.23.0, Marimo has a Pre-Auth RCE vulnerability. The terminal WebSocket endpoint /terminal/ws lacks authentication validation, allowing an unauthenticated attacker to obtain a full PTY shell and execute arbitrary…
KEV Apr 23, 2026 -
High 8.2CVE-2026-39363 Public exploit
Vite Affected by Arbitrary File Read via Vite Dev Server WebSocket
Vite is a frontend tooling framework for JavaScript. From 6.0.0 to before 6.4.2, 7.3.2, and 8.0.5, if it is possible to connect to the Vite dev server’s WebSocket without an Origin header, an attacker can invoke fetchModule via the custom WebSocket event vite…
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Medium 6.9CVE-2026-35584 Public exploit
FreeScout has an Unauthenticated IDOR in Open Tracking Endpoint Allows Cross-Conversation Thread Manipulation and Enumeration
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to 1.8.212, the endpoint GET /thread/read/{conversation_id}/{thread_id} does not require authentication and does not validate whether the given thread_id belongs to the g…
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Critical 9.8
Weaver E-cology 10.0 Unauthenticated RCE via dubboApi Debug Endpoint
Weaver (Fanwei) E-cology 10.0 versions prior to 20260312 contain an unauthenticated remote code execution vulnerability in the /papi/esearch/data/devops/dubboApi/debug/method endpoint that allows attackers to execute arbitrary commands by invoking exposed deb…
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Critical 9.3CVE-2026-28766 Public exploit
Gardyn Cloud API Missing Authentication for Critical Function
A specific endpoint exposes all user account information for registered Gardyn users without requiring authentication.
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Medium 5.3CVE-2026-28767 Public exploit
Gardyn Cloud API Missing Authentication for Critical Function
A specific administrative endpoint notifications is accessible without proper authentication.
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High 7.5CVE-2026-32646 Public exploit
Gardyn Cloud API Missing Authentication for Critical Function
A specific administrative endpoint is accessible without proper authentication, exposing device management functions.
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Medium 5.9CVE-2026-34227 Public exploit
Sliver One-Click Remote Access: Insecure CORS & Unauthenticated MCP Interface
Sliver is a command and control framework that uses a custom Wireguard netstack. Prior to version 1.7.4, a single click on a malicious link gives an unauthenticated attacker immediate, silent control over every active C2 session or beacon, capable of exfiltra…
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High 7.7CVE-2026-34200 Public exploit
Nhost CLI MCP Server: Missing Inbound Authentication on Explicitly Bound Network Port
Nhost is an open source Firebase alternative with GraphQL. Prior to version 1.41.0, The Nhost CLI MCP server, when explicitly configured to listen on a network port, applies no inbound authentication and does not enforce strict CORS. This allows a malicious w…
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Critical 9.8
Nginx UI: Unauthenticated MCP Endpoint Allows Remote Nginx Takeover
Nginx UI is a web user interface for the Nginx web server. In versions 2.3.5 and prior, the nginx-ui MCP (Model Context Protocol) integration exposes two HTTP endpoints: /mcp and /mcp_message. While /mcp requires both IP whitelisting and authentication (AuthR…