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
1,264 results · Clear filters · Feed
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High 7.5
Milvus 2.6.22, 3.0.0 Unauthenticated Denial of Service via /management/stop
Milvus through 2.6.22 and 3.0.0 contains an unauthenticated denial of service vulnerability that allows remote attackers to terminate service components by sending a crafted HTTP GET request to the management server on port 9091. Attackers can exploit the unp…
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High 7.5
Langflow is affected by security vulnerabilities in Model Context Protocol features
IBM Langflow OSS 1.0.0 through 1.10.3 contain an authentication bypass vulnerability in the Model Context Protocol (MCP) composer endpoint when mcp_composer_enabled=true (default) and projects are configured with auth_type=oauth .
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High 7.5
Apache Answer: Unauthenticated OAuth Email-Binding Account Takeover via Existing User Confirmation Flow
Insufficient Verification of Data Authenticity vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.1. A missing authorization check in the external-login email binding flow allows unauthenticated attackers to take over arbitrary user…
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High 7.5
In Eclipse Theia versions up to and including 1.73.1, the `@theia/filesystem` backend exposes HTTP file-download endpoi…
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High 8.8
In Eclipse Theia versions up to and including 1.73.1, the `@theia/filesystem` backend binds `POST /file-upload` in ever…
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High 7.5
Book-Management-System - Unauthenticated Disclosure of Student PII and Borrowing History
Book-Management-System's Flask API endpoints /student, /record, /books, /find_stu_book, and /find_not_return_book are missing the @login_required decorator that protects sibling routes (/search_student, /storage) in the same file. Because card_id values are s…
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High 7.3CVE-2026-25703 Scanner template
Potential information leakage from manager /network/graph API in NeuVector
NeuVector through 5.4.9 is can potentially leak information from manager /network/graph API due to missing authentication and cached data containing sensitive information.
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High 7.3
H3C NX15 networkSetup missing authentication
A security vulnerability has been detected in H3C NX15 V100R017. Impacted is an unknown function of the file /api/wizard/networkSetup. Such manipulation leads to missing authentication. The attack may be performed from remote. The vendor was contacted early a…
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High 8.2
A vulnerability in Veeam Service Provider Console allowing an unauthenticated attacker to access the proxied appliance …
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High 8.1
Missing Authentication for Critical Function in Data Modem
Cryptographic Issue while processing registration requests with malformed or missing authentication parameters.
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High 7.8
Dell Display and Peripheral Manager (DDPM Mac), versions prior to 2.3.0.1005, contain a Missing Authentication for Crit…
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High 8.1
OpenEMR 8.2.0 OAuth2 Dynamic Client Registration Unauthorized FHIR Access
OpenEMR through 8.2.0 contains an improper authentication vulnerability in the OAuth2 dynamic client registration endpoint that allows unauthenticated attackers to register a malicious client with system-level FHIR scopes by supplying a self-generated RSA key…
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High 7.5
Admidio before 5.0.11 Authentication Bypass via forum.php
Admidio before 5.0.11 contains an authentication bypass vulnerability in the forum module when configured in login-only mode. The access control logic in modules/forum.php fails to validate the login-only configuration state, allowing unauthenticated attacker…
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High 7.5
ArcadeDB before 26.7.3 Authentication Bypass via MCP Transport
ArcadeDB versions before 26.7.3 fail to bind the authenticated principal in the MCP HTTP transport, causing all engine permission checks to silently pass as no-ops. Non-root MCP-allowed users can perform arbitrary database writes, DDL, schema mutations, and e…
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High 7.5
`@dynatrace-oss/dynatrace-mcp-server` has Unauthenticated HTTP MCP Tool Invocation
### Summary `@dynatrace-oss/dynatrace-mcp-server` v1.8.5 exposes an HTTP transport mode (`--http` flag) that performs no authentication, session validation, or origin/host verification before dispatching MCP tool calls. Any network-reachable attacker can send…
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High 7.5
Missing authentication and permissive CORS policy
ANDRITZ HIPASE-250 (formerly 250 SCALA), in the default configuration of affected versions, exposes its data and configuration endpoint without any authentication and permissive CORS on every response. An unauthenticated attacker with network access can read …
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High 8.8
Toptech Systems RCU II+ and Multiload II+ Missing Authentication for Critical Function
The RCU II+ and Multiload II+ are vulnerable to an unauthenticated service that exposes a debug interface granting full root-level access to the embedded system. This vulnerability stems from a network-accessible port running a Target Communications Framework…
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High 7.5
CVE-2026-15978
SGLang contains a model weight exfiltration vulnerability when no API keys are configured, as SGLang will expose two endpoints that allow a remote attacker to trigger distributed weight broadcasting using NCCL and then triggering data transfer, attackers can …
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High 7.5
Apache JSPWiki: Pre-Authentication Arbitrary Wiki Markup Rendering
Arbitrary Wiki Markup rendering due to lack of authentication in Apache JSPWiki up to 2.12.3 allows attacker to obtain sensitive data stored in JSPWiki variables. Users are recommended to upgrade to version 2.12.4 or 3.0.0, which fixes this issue.
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High 7.5
OpenCost < 1.121.0 Unauthenticated Helm Values Exposure and Admin Bypass
OpenCost before 1.121.0 fails to authenticate the GET /helmValues endpoint, exposing base64-decoded HELM_VALUES environment variable containing cloud provider credentials. Additionally, adminAuthMiddleware fails open when ADMIN_TOKEN is unset, allowing unauth…
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High 8.2
Authentication Bypass in FTC Software's E-Commerce Management Panel
Missing authentication for critical function vulnerability in FTC Software IT Services FTC E-Commerce Management Panel allows Authentication Bypass. This issue affects FTC E-Commerce Management Panel: before 1.0.2.
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High 8.6
CentreStack < 17.2 Unauthenticated API Authorization Bypass
CentreStack before 17.2 contains an authentication bypass vulnerability that allows unauthenticated attackers to read, write, or delete arbitrary account settings by exploiting exposed API endpoints that lack authorization checks. Attackers can generate valid…
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High 7.5
CentreStack < 17.3 Unauthenticated User Creation via Deserialization in GSNamespace.dll
CentreStack before 17.3 contains an unauthenticated deserialization vulnerability in GSNamespace.dll that allows unauthenticated attackers to create arbitrary local OS user accounts by supplying a crafted base64-encoded XML string to exposed API endpoints. At…
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High 7.3
Pcp: pcp pmproxy: unauthenticated access to /store endpoint allows bypassing pmcd access rules
An unauthenticated remote attacker can bypass access controls by sending crafted requests to the PCP pmproxy /store endpoint. This allows the attacker to overwrite any PMDA metric, leading to arbitrary code execution and system takeover.
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High 8.0CVE-2026-47858 Public exploit
live information startup mode is vulnerable for remote code execution
Starting Spring Boot applications in the Spring Tools with the live information mode enabled makes the running application vulnerable against JMX-based remote code execution. Affected Spring Products and Versions: Spring Tools for Eclipse: 5.2.0 and earlier S…
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High 7.5
ATEN Unizon RpcProvider Missing Authentication Denial-of-Service Vulnerability
ATEN Unizon RpcProvider Missing Authentication Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of ATEN Unizon. Authentication is not required to exploit this vulnera…
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High 7.1
IBM WebSphere Application Server Liberty is affected by a remote code execution and path-segment injection vulnerability
IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 is affected by remote code execution with the collectiveController-1.0 feature enabled.
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High 8.8
CVE-2026-16771
In firmware versions 2.7.7 and earlier, the Arris BGW210‑700 gateway fails to enforce any server‑side authentication on its /cgi-bin/*.ha management endpoints, relying solely on client‑side CSS/JavaScript gating that can be bypassed by any HTTP client. This a…
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High 8.8
Improper Authentication in Universal Sotware's UKBS
Missing authentication for critical function vulnerability in Universal Software Inc. UKBS allows Accessing Functionality Not Properly Constrained by ACLs. This issue affects UKBS: through 28072026. NOTE: The vendor was contacted and it was learned that the p…
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High 8.7
Multiple vulnerabilities in Ghost Robotics' Vision 60
A lack of authentication in the mobile app (APK v5.5.0) for Ghost Robotics' Vision 60 robot allows an unauthenticated attacker connected to the device's internal Wi-Fi network to gain unrestricted access to the web administration interface and the HTTP API. D…
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High 8.2CVE-2026-63765 Public exploit
Chatwoot < 4.16.0 Unauthenticated ActiveStorage Direct Upload Arbitrary Blob Creation
Chatwoot before 4.16.0 contains an authentication bypass vulnerability in the direct uploads controller that allows unauthenticated attackers to create arbitrary ActiveStorage blobs in any tenant account. Attackers can exploit missing authentication checks to…
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High 8.8
Vulnerability in the Oracle Platform Security for Java product of Oracle Fusion Middleware (component: Centralized Thir…
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High 8.8
Vulnerability in the Oracle Platform Security for Java product of Oracle Fusion Middleware (component: Centralized Thir…
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High 8.8
Vulnerability in the Oracle Platform Security for Java product of Oracle Fusion Middleware (component: Centralized Thir…
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High 7.5
Feedbin Unauthenticated Entry Content Disclosure via GET /api/v2/entries/:id/text
Feedbin (commit 739884a) contains an unauthenticated information disclosure vulnerability that allows unauthenticated attackers to retrieve private article content by sending requests to the entries text API endpoint, which skips the authorization before-acti…
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High 8.1
Vulnerability in the Oracle Workflow product of Oracle E-Business Suite (component: Workflow Notification Mailer). Supp…
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High 8.8
Vulnerability in the Oracle Applications Framework product of Oracle E-Business Suite (component: Web Utilities). Suppo…
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High 8.8
Vulnerability in the Oracle Yard Management product of Oracle E-Business Suite (component: Internal Operations). Suppor…
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High 8.8
Vulnerability in the Oracle Flow Manufacturing product of Oracle E-Business Suite (component: Internal Operations). Sup…
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High 7.5
Vulnerability in the Oracle Purchasing product of Oracle E-Business Suite (component: Internal Operations). Supported v…