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
1,113 results · Clear filters · Feed
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Critical 9.8
Apache Answer: Reaction API authorization bypass for restricted content
Missing authentication for critical function vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.2. The reaction API did not enforce content visibility controls, allowing unauthorized users to read reaction metadata from restricted c…
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Critical 9.8
Apache Kylin: unauthenticated broadcast API and polymorphic deserialization
Missing authentication for in-house broadcast and polymorphic deserialization vulnerability in Apache Kylin. Impact most to the kylin services that are directly exposed to public network, which is not common. In-house kylin deployments are mostly not impacted…
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Critical 9.3
Insecure Default Policy and Unrestricted OIDC Enrollment in Google OSS Agent Mesh (SAM)
Missing Authorization (CWE-862) and Initialization of a Resource with an Insecure Default (CWE-1188) in the MCP proxy (HandleStreamPassThrough in mcp_service.go) and OIDC registration flow (GET /info and POST /register in internal/controlplane/server.go) in G…
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Critical 9.3
Missing Authentication on /libp2p-http Ingress in Google OSS Agent Mesh (SAM)
Missing Authentication for Critical Function (CWE-306) and Missing Authorization (CWE-862) in the /libp2p-http ingress server (StartIngressServer in cmd/sam-node/node.go) in Google OSS Agent Mesh (SAM) versions 0.1.0-alpha.1 through 0.1.0-alpha.2 allow an una…
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Critical 9.8
LangChat through commit 2a6285a Missing Authentication on REST API Controllers
LangChat through commit 2a6285a contains a missing authentication vulnerability that allows unauthenticated remote attackers to access REST controllers because no Sa-Token interceptor is registered. Attackers can query /api/v1/auth/users to read plaintext pas…
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Critical 9.8
IceCMS through 4.1.5 Missing Authentication via /User Administrative Endpoints
IceCMS through 4.1.5 contains a missing authentication vulnerability that allows unauthenticated attackers to modify, delete, or disable any account because /User/** is excluded from the Shiro jwt filter. Attackers can send PUT requests to /User/updateUser to…
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Critical 9.8
Misaka Danmu Server through 2.8.9 Authentication Bypass via Config-History Rollback
Misaka Danmu Server through 2.8.9 contains an authentication bypass vulnerability that allows unauthenticated attackers to write arbitrary configuration keys via the unprotected POST /api/ui/config-history/rollback endpoint. Attackers can set the ipWhitelist …
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Critical 9.8
FastapiAdmin through 3.0 Authentication Bypass via Auto-Login Endpoints
FastapiAdmin through 3.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to obtain sessions for any user by abusing unprotected auto-login endpoints. Attackers can list users via /api/v1/auth/auto-login/users, mint a supe…
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Critical 9.8
Webreaper Damselfly through 4.5.3 Missing Authentication on REST API Controllers
Webreaper Damselfly through 4.5.3 contains an authentication bypass vulnerability that allows unauthenticated attackers to access all /api/* routes because controller authorization attributes are commented out. Attackers can send PUT /api/users with Admin rol…
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Critical 9.6
Dockhand: Unauthenticated container exec via WebSocket upgrade
Dockhand is a Docker management application. Prior to 1.0.34, the in-browser container terminal endpoint /api/containers/<id>/exec does not enforce authentication on the WebSocket upgrade request. When an unauthenticated attacker has network reach to Dockhand…
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Critical 9.1
J4Care dcm4che Missing Authentication for Critical Function
In the default configuration, the archive accepts DICOM associations from an unregistered calling AE. A remote peer can use C-FIND and C-GET to enumerate and retrieve patient information and medical images. It can also use C-STORE to file fabricated study con…
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Critical 9.8
Apache Kylin: Missing authentication on certain cache API endpoints
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection'), Missing Authentication for Critical Function vulnerability in Apache Kylin. Impact most to the kylin services that are directly exposed to public network, which is not commo…
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Critical 9.8
Archon 0.2.13 through 0.11.1 Missing Authentication via /api/* Control API
Archon 0.2.13 through 0.11.1 contains a missing authentication vulnerability that allows unauthenticated attackers to access the /api/* control API, which binds to 0.0.0.0 by default. Attackers with network access can send messages to the AI coding agent, whi…
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Critical 9.8
EnergizeLab Eilik Unauthenticated AI Model Administration and Runtime Model Switching
The EnergizeLab Eilik and EilikO FastAPI AI inference and profiling services expose AI model administration functions without authentication. An unauthenticated remote attacker can change AI model configuration and switch the model in use at runtime.
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Critical 9.8
Pre-Authentication Admin Bypass and Remote Code Execution in Nutanix Prism Gateway inside AOS
An unauthenticated remote attacker can bypass authentication and gain full access to administrative API endpoints in Nutanix Prism Element by including a crafted internal management HTTP header. The vulnerability is caused by a misconfiguration in the applica…
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Critical 9.3
Pre-Authentication Multiple Critical Vulnerabilities in QNAP sMedioDTCPServer
A missing authentication for critical function vulnerability has been reported to affect sMedio DTCP MOVE. If exploited, the vulnerability could allow remote attackers to gain access to the system. We have already fixed the vulnerability in the following vers…
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Critical 9.2
Dgraph: Zero Unauthenticated HTTP Admin removeNode Denial of Service
Dgraph is an open source distributed GraphQL database. Prior to 25.4.0, Dgraph Zero registers administrative HTTP routes on port 6080 without authentication when the administrative interface is enabled. The /removeNode route accepts attacker-controlled id and…
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Critical 9.8
Lantronix XPress-DR 8.1.0.0 Unauthenticated Configuration Write via UDP 30718
Lantronix XPress-DR and XPress-DR-I (CoBos-family) firmware through 8.1.0.0 contains a missing authentication vulnerability that allows remote attackers to read and persistently overwrite device configuration by sending crafted frames to the unauthenticated U…
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Critical 9.8
Missing Authentication for Critical Function in TR7 Cyber Defense's TR7 ASP
Missing authentication for critical function vulnerability in TR7 Cyber Defense Inc. TR7 ASP on virtual appliance and TR7 Cyber Defense Inc. TR7 ASP on physical appliance allows OS Command Injection. This issue affects TR7 ASP: from 1.0.40.236 before 1.0.…
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Critical 9.6
RClone Manager: Unauthenticated RClone Daemon Enables Remote Attack via Malicious Web Page
RClone Manager is a cross-platform GUI application designed to help users manage Rclone remotes efficiently. Prior to 0.2.7, RClone Manager starts the local rclone rcd service on 127.0.0.1:51900 with --rc-no-auth, --rc-allow-origin *, and --rc-serve. A malici…
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Critical 9.8
BUG-000187331 Portal for ArcGIS has a security vulnerability
A flaw in Portal for ArcGIS allows unauthenticated access to certain Portal Administrator API endpoints under specific conditions. This could enable an attacker to access administrative functionality that should require authentication.
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Critical 9.1
NVIDIA AIStore for Linux contains a missing authentication vulnerability in the token-revocation endpoint where an unau…
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Critical 10.0
Missing Authentication Vulnerability in JTL-WMS
The authorization middleware of the WMS MobileServer fails to require authentication in two distinct cases. First, it only requires an Authorization header for GET and HEAD requests; requests using any other HTTP method are processed without an authentication…
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Critical 9.8
Metasploit Framework Web Service REST API Missing Authentication on Credential Endpoints
The Metasploit Framework Web Service REST API (msf-ws) exposes the credential store through Msf::WebServices::CredentialServlet. Every mutating and read route in this servlet calls warden.authenticate! before processing a request, except the update_credential…
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Critical 9.8
In HAProxy Data Plane API 2.2.0 through 3.4.3 (and corresponding Enterprise Edition releases), Server.ConfigureAPI() ha…
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Critical 9.8
PraisonAI AgentTeam.launch exposes unauthenticated remote agent listing and invocation endpoints
PraisonAI is a multi-agent teams system. Prior to praisonaiagents 1.6.59, AgentTeam.launch and the Agents alias register GET /{path}/list, POST /{path}, and `POST /{path}/{agent_id}' without access-control checks before listing agents or calling agent.chat. A…
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Critical 9.3
@neo4j/graphql: schema-level and type-level @authentication not enforced on top-level @cypher fields
In @neo4j/graphql versions up to and including 7.6.3, @authentication directives applied at the schema level or on the Query or Mutation types are silently ignored for top-level fields annotated with @cypher. Only @authentication directives placed directly on…
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Critical 9.9
Astron Agent: Unsandboxed code-node leads to cross-tenant RCE
Astron Agent is an agentic workflow platform for building and running AI agents. Prior to 1.1.2, the default workflow code-node path through /console-api/workflow/code/run and /workflow/v1/run selects LocalExecutor in core/workflow/engine/nodes/code/code_node…
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Critical 9.3
x64dbg-MCP Server exposes debugger operations to unauthenticated network clients
x64dbg-MCP Server is a native Model Context Protocol (MCP) plugin for x64dbg that exposes the debugger's full functionality over HTTP. Prior to 1.1, x64dbg-MCP Server exposes all MCP debugger tools over HTTP and SSE without authentication while listening on 0…
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Critical 9.8
Azure App Service Remote Code Execution Vulnerability
Missing authentication for critical function in Azure App Service allows an unauthorized attacker to execute code over a network.
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Critical 9.8
IBM Guardium Data Protection is affected by vulnerability
IBM Guardium Data Protection 12.2, and 12.2.2 could allow a remote attacker to execute arbitrary management operations due to missing authentication for critical function.
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Critical 9.8
Dromara Skyeye xxl-job-admin Missing Authentication on Job Endpoints Allows RCE
Dromara Skyeye through commit 003549ae5615bd114ba5bb8ddf6a8e8ead97c321 contains a missing authentication vulnerability in bundled xxl-job-admin JobInfoController endpoints annotated with @PermissionLimit(limit = false). Unauthenticated attackers can POST GLUE…
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Critical 9.1
TVU Networks Receiver/Transceiver Missing Authentication via REST API
TVU Networks Receiver/Transceiver devices running firmware before version 7.9 contain a missing authentication vulnerability that allows remote unauthenticated attackers to read sensitive device information and modify device configuration via unprotected REST…
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Critical 9.8
IBM Guardium Data Protection Missing Authentication
IBM Guardium Data Protection 12.1 and 12.2.2 are vulnerable to missing authentication in the edge-controller component. An unauthenticated remote attacker could exploit this vulnerability to execute arbitrary container images and gain control of managed edge …
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Critical 9.8
mJobTime 15.7.3.32 Unauthenticated SQL Execution RCE via Login.aspx
mJobTime through build 15.7.3.32 contains an unauthenticated SQL execution vulnerability in the Login.aspx admin panel handlers, where the runQueryButton postback and exportSqlQuery_Server PageMethod execute caller-supplied SQL against the backing Sybase SQL …
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Critical 9.8
Iskratel Innbox Unauthenticated Remote Code Execution via login.xgi CLI Parameter
OS Command Injection in the login.xgi CGI endpoint in Iskratel Innbox GPON ONT devices allows an unauthenticated remote attacker to execute arbitrary commands as root via the CLI parameter.
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Critical 9.8
Missing Authentication for Critical Function in the Patroni REST API in Splunk Enterprise
In Splunk Enterprise versions below 10.4.3 and 10.2.7, an unauthenticated user with network access to the Patroni Representational State Transfer (REST) Application Programming Interface (API) on a search head cluster member could execute attacker-controlled …
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Critical 9.8
Cisco License On-Prem Security Hardening Release
As part of Cisco's ongoing commitment to proactive security and product quality, the engineering team for Cisco License On-Prem, formerly Cisco Smart Software Manager On-Prem (SSM On-Prem), has conducted a comprehensive internal security review. This review r…
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Critical 9.8CVE-2026-62253 Public exploit
Homer: Complete Authentication Bypass When coordinator.jwt.secret Is Empty (Default)
Homer is open source telecom observability software. Prior to version 11.0.283, both JWT middleware functions (`JWTMiddleware` and `JWTMiddlewareV4`) immediately return `next(c)` when `jwtSecret == ""`. The JWT secret defaults to an empty string. On a default…
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Critical 9.4
LMCache through 0.5.5 Missing Authentication in MP HTTP Server Management API
LMCache through 0.5.5 contains a missing authentication vulnerability in the multiprocess mode HTTP server that allows remote unauthenticated attackers to access management endpoints listening on all interfaces by default. Attackers can read environment crede…