Weakness (CWE)
CWE-287: Improper Authentication
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
How to prevent it (1 mitigation)
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Architecture and Design
Use an authentication framework or library such as the OWASP ESAPI Authentication feature.
Source: MITRE CWE-287
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Critical 9.2
Critical Pre-Authentication Vulnerability in BeyondTrust Remote Support and Privileged Remote Access
A critical pre-authentication vulnerability exists in the authentication subsystem of BeyondTrust Remote Support and Privileged Remote Access. Improper validation of authentication data may allow a network-positioned attacker to bypass access controls and gai…
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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 9.4
fast-mcp-telegram: Bearer token path traversal bypasses reserved Telegram session protection
fast-mcp-telegram is a Telegram MCP Server. Prior to 0.19.1, fast-mcp-telegram validates HTTP Bearer tokens by joining the raw token string into a session-file path. The verifier rejects the exact reserved token telegram, but it does not reject path separator…
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Critical 9.8
SMS Alert <= 3.9.5 - Unauthenticated Privilege Escalation via Arbitrary Password Reset
The SMS Alert – SMS & OTP for WooCommerce, Order Notifications & Abandoned Cart Recovery plugin for WordPress is vulnerable to privilege escalation via account takeover in all versions up to, and including, 3.9.5. This is due to the plugin not properly valida…
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Critical 10.0
Kestra: Unauthenticated Remote Code Execution via Authentication Bypass in `AuthenticationFilter`
Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, AuthenticationFilter in Kestra OSS uses request.getPath().endsWith("/configs") to whitelist the public configuration endpoint from Basic Auth. Because the check is a su…
KEV Sep 2, 2026 -
Critical 9.1
Flowise - Authentication Bypass via Unprotected Registration Endpoint
Flowise contains an authentication bypass vulnerability in the unprotected /api/v1/account/register endpoint that allows unauthenticated attackers to create user accounts. Remote attackers can exploit this endpoint to register arbitrary accounts and authentic…
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Critical 9.1
File Browser: Authentication Bypass via Proxy Auth Header Forgery
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Starting with 2.0.0-rc.1, when FileBrowser is configured with proxy authentication (auth.method=proxy), any unauthenticate…
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Critical 9.3
Rocket.Chat: Email Parameter Fallback Leads To Account Takeover Within Apple OAuth
Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, and 7.10.13, in apps/meteor/app/apple/server/loginHandler.ts, handleIdentityToken parses a JWT issued by Apple during the OAu…
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Critical 9.1
Capgo - Unauthenticated API Key Generation via Client-Side Parameter Manipulation
Capgo before 12.128.2 contains a broken authentication vulnerability in its API key generation mechanism. API keys are exposed in frontend requests, and the backend fails to validate that keys are securely generated and bound to the authenticated user. An att…
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Critical 9.0CVE-2026-11374 Public exploit
Account Takeover via Predictable SSO Ticket Generation
In ManageEngine ADSelfService Plus, RecoveryManager Plus, M365 Manager Plus, and ADAudit Plus, the SSO tickets generated to authenticate that session could be predicted by an unauthenticated user, leading to account takeover.
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Critical 9.8
Unauthenticated Flow Execution via Webhook Endpoint in Langflow OSS
IBM Langflow OSS 1.0.0 through 1.8.4 could allow unauthenticated attackers to access protected MCP project resources and execute MCP operations due to improper authorization enforcement in the Streamable MCP transport endpoint.
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Critical 10.0
Azure Active Directory Elevation of Privilege Vulnerability
Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
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Critical 9.1
Relyra SAML SignatureValue not cryptographically verified -> authentication bypass
Relyra is a strict-by-default SAML 2.0 Service Provider library for Elixir and Phoenix. Versions 1.0.0 and 1.1.0 accept forged SAML signatures because SignatureValue was not cryptographically verified before the library returned a successful authentication re…
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Critical 9.3
googleapis/mcp-toolbox: authentication bypass vulnerability in the generic opaque token validation path (validateOpaqueToken)
An authentication bypass vulnerability exists in the generic opaque token validation path (validateOpaqueToken) of googleapis/mcp-toolbox. When the toolbox validates an opaque token via an OAuth 2.0 introspection endpoint (RFC 7662), it decodes the response i…
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Critical 9.3
googleapis/mcp-toolbox: authentication bypass vulnerability in the generic opaque token validation path (validateOpaqueToken)
An authentication bypass vulnerability exists in the generic opaque token validation path (validateOpaqueToken) of googleapis/mcp-toolbox. When verifying an unparsed opaque token via an OAuth 2.0 introspection endpoint (RFC 7662), the toolbox decodes the resp…
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Critical 9.8
Vulnerability in the Siebel CRM Cloud Applications product of Oracle Siebel CRM (component: Siebel Cloud Manager). Supp…
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Critical 9.8
Vulnerability in the Siebel Apps - Marketing product of Oracle Siebel CRM (component: Marketing). Supported versions th…
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Critical 9.8
Vulnerability in the Oracle Agile PLM product of Oracle Supply Chain (component: Security). The supported version that …
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Critical 9.8
Metacat has an unauthenticated SQL injection vulnerability
Metacat is data repository software that helps researchers preserve, share, and discover data. Versions 2.0.0 and and above contain an unauthenticated SQL injection in the /harvesterRegistration endpoint. HarvesterRegistration.dbInsert() builds an INSERT agai…
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Critical 9.8
Nefteprodukttekhnika BUK TS-G Gas Station Automation System Authentication Bypass via ajax-login.php Accepting Arbitrary Credentials
Nefteprodukttekhnika BUK TS-G Gas Station Automation System 2.9.1 through 2.10.2 on Linux contains an Improper Authentication vulnerability (CWE-287) in the system configuration module.
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Critical 9.8
Improper authentication checks in the OAuth implementation allow account hijacking even when OAuth is not configured or…
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Critical 9.1
An insecure authentication vulnerability in the /api/social-sign-in endpoint of bookcars v8.3 allows attackers to bypas…
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Critical 9.3
User Authentication Bypass in VPN Remote Access and Mobile Access
A logic flow weakness in Remote Access and Mobile Access certificate validation in deprecated IKEv1 key exchange allows an unauthenticated remote attacker to bypass user authentication and establish a remote access VPN connection without a valid user password.
KEV Jun 8, 2026 -
Critical 10.0
UDS Identity Config has a client authentication bypass in `ClientIdAndKubernetesSecretAuthenticator`
UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS Core's Identity deployment. In versions 0.11.0 through 0.26.0, a logic error in the `client-kubernetes-secret` Keycloak client authenticator …
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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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Critical 9.4
SCREEN_CLICK Authentication Bypass
The debugging routine SCREEN_CLICK(5053) enables a connection to skip the standard device login prompt entirely and directly enter an interactive shell interface.
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Critical 9.3
Exposed Hard-coded M3WebServer Backend API Key
The production build of the M3WebServer hard-codes its backend API keys, which can be easily intercepted through verbose error handling pages.
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Critical 9.8
authentik: SourceStage bypass via empty POST
authentik is an open-source identity provider. Prior to versions 2025.12.6, 2026.2.4, and 2026.5.1, the Source stage can be bypassed by sending an empty POST. This issue has been patched in versions 2025.12.6, 2026.2.4, and 2026.5.1.
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Critical 9.8CVE-2026-5076 Public exploit
ARMember Premium <= 7.3.1 - Insecure Password Reset Mechanism to Unauthenticated Privilege Escalation
The ARMember Premium plugin for WordPress is vulnerable to an insecure password reset mechanism in all versions up to, and including, 7.3.1. The plugin stores a plaintext copy of the password reset key in the `arm_reset_password_key` user meta field when a us…
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Critical 10.0
Predator Connect W6x: Improper Authentication
Web endpoints intended for the Acer Connect app improperly validate the HTTP Authorization header, failing to block requests when Base64 decoding fails.
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Critical 9.8
OTP Login With Phone Number, OTP Verification <= 1.8.60 - Unauthenticated Authentication Bypass via Firebase OTP Verification
The OTP Login With Phone Number, OTP Verification plugin for WordPress is vulnerable to authentication bypass in versions 1.8.50 through 1.8.60. This is due to the Firebase verification flow in the `lwp_ajax_register` AJAX handler not binding the Firebase ses…
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Critical 10.0
Vulnerability in Oracle REST Data Services (component: Backend-as-a-Service). Supported versions that are affected are …
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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 -
Critical 9.1CVE-2026-9090 Public exploit
CVE-2026-9090
Casdoor versions 2.362.0 and earlier contain a vulnerability that allows an attacker to bypass authentication by supplying an arbitrary signing certificate. The buildSpCertificateStore function extracts the X.509 certificate directly from the incoming SAMLRes…
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Critical 9.3
Authentication Bypass
The Mennekes Amtron series (firmware versions ≤ 5.22.3) is vulnerable to an authentication bypass. An unauthenticated remote attacker can change the password of the user account via a crafted POST request to the /operator/operator endpoint.
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Critical 9.1
Authentication bypass vulnerability found in Aspera High-Speed Transfer Server for Cloud Pak for Integration
IBM Aspera HSTS for CP4I 1.5.1 through 1.5.19 is affected by an authentication bypass vulnerability. A transfer client may be able to take advantage of this vulnerability to access files in the server's local storage that they should not have access to, when …
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Critical 9.3
Kavita: Pre-Auth Account Takeover
Kavita is a cross platform reading server. Prior to 0.9.0.2, an Improper Token validation flaw permits a remote and unauthenticated threat actor to request a JWT for any user including admins given knowledge of their username. This vulnerability is fixed in 0…
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Critical 10.0
Azure Resource Manager Elevation of Privilege Vulnerability
Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a network.
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Critical 9.8
Sunshine: Authentication bypass via improper client certificate validation
Sunshine is a self-hosted game stream host for Moonlight. In versions prior to 2026.516.143833, the client-certificate authentication can be bypassed because of how OpenSSL verification results are handled. In src/crypto.cpp, the custom verify callback treats…
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Critical —
MCP Gateway: Authority-injection and JWT/session bypass via the unauthenticated router hair-pin "router-key" / "mcp-init-host" path
## Summary The MCP router (ext_proc) exposes an `initialize`-method code path that, when a request carries an `mcp-init-host` header, bypasses the gateway JWT session validator and rewrites the upstream `:authority` header to whatever the caller chooses, gate…