CVE-2026-44428

The MCP Registry provides MCP clients with a list of MCP servers, like an app store for MCP servers. Prior to 1.7.6, the client-side and server-side GitHub OIDC flow is bound only to a global audience string, not to the specific registry instance being targeted. On the client side, the publisher...

CVE-2026-44428 MCP Registry: GitHub OIDC tokens replayable across registry deployments due to shared audience

The MCP Registry provides MCP clients with a list of MCP servers, like an app store for MCP servers. Prior to 1.7.6, the client-side and server-side GitHub OIDC flow is bound only to a global audience string, not to the specific registry instance being targeted. On the client side, the publisher...

CVE-2026-24899 Fleet Windows MDM Azure AD JWT Authentication Bypass

Fleet is open source device management software. Prior to version 4.82.0, a vulnerability in Fleet's Windows MDM enrollment flow allows authentication tokens from any Azure AD tenant to be accepted. Because Fleet validates JWT signatures using Microsoft's multi-tenant JWKS endpoint but does not...

CVE-2026-24899 Fleet Windows MDM Azure AD JWT Authentication Bypass

Fleet is open source device management software. Prior to version 4.82.0, a vulnerability in Fleet's Windows MDM enrollment flow allows authentication tokens from any Azure AD tenant to be accepted. Because Fleet validates JWT signatures using Microsoft's multi-tenant JWKS endpoint but does not...

Fleet Windows MDM Azure AD JWT Authentication Bypass

Summary A vulnerability in Fleet's Windows MDM enrollment flow allows authentication tokens from any Azure AD tenant to be accepted. Because Fleet validates JWT signatures using Microsoft's multi-tenant JWKS endpoint but does not enforce the aud audience or iss issuer claims, any Microsoft-signed...

GHSA-FFG9-J72F-J6XM Fleet Windows MDM Azure AD JWT Authentication Bypass

Summary A vulnerability in Fleet's Windows MDM enrollment flow allows authentication tokens from any Azure AD tenant to be accepted. Because Fleet validates JWT signatures using Microsoft's multi-tenant JWKS endpoint but does not enforce the aud audience or iss issuer claims, any Microsoft-signed...

MCP Registry 代码问题漏洞

MCP Registry is an open-source MCP server application store developed by Model Context Protocol. Versions of MCP Registry prior to 1.7.6 contained code-related vulnerabilities. These vulnerabilities stemmed from the OIDC process on both the client and server sides being tied only to a global...

Unity Catalog has a JWT Issuer Validation Bypass tht Allows Complete User Impersonation

Context: A critical authentication bypass vulnerability exists in the Unity Catalog token exchange endpoint /api/1.0/unity-control/auth/tokens. The endpoint extracts the issuer iss claim from incoming JWTs and uses it to dynamically fetch the JWKS endpoint for signature validation without...

GHSA-QQCJ-RGHW-829X Unity Catalog has a JWT Issuer Validation Bypass tht Allows Complete User Impersonation

Context: A critical authentication bypass vulnerability exists in the Unity Catalog token exchange endpoint /api/1.0/unity-control/auth/tokens. The endpoint extracts the issuer iss claim from incoming JWTs and uses it to dynamically fetch the JWKS endpoint for signature validation without...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF due to the improper validation of the audience parameter in the OIDC authentication process. An attacker can gain unauthorized publish permissions by replaying a valid GitHub OIDC token obtained from one...

MCP Registry's GitHub OIDC tokens are replayable across registry deployments due to shared audience

SECURITY registry001 Vulnerability Report While analyzing the code logic, an area that may lead to unintended behavior under specific conditions was discovered. Overview - Verified Version: c5c4b9e8890dd5754bee889b2f1417f4fe3b5ce5 - Vulnerability Type: Authentication bypass via cross-registry OID...

GHSA-95C3-6VVW-4MRQ MCP Registry's GitHub OIDC tokens are replayable across registry deployments due to shared audience

SECURITY registry001 Vulnerability Report While analyzing the code logic, an area that may lead to unintended behavior under specific conditions was discovered. Overview - Verified Version: c5c4b9e8890dd5754bee889b2f1417f4fe3b5ce5 - Vulnerability Type: Authentication bypass via cross-registry OID...

PT-2026-39262

Name of the Vulnerable Software and Affected Versions MCP Registry versions prior to 1.7.6 Description The GitHub OIDC flow for both client and server is bound to a global audience string instead of the specific registry instance being targeted. On the client side, the publisher always appends...

CVE-2026-33557

A flaw was found in Apache Kafka. By default, the sasl.oauthbearer.jwt.validator.class property is set to org.apache.kafka.common.security.oauthbearer.DefaultJwtValidator, which does not validate JSON Web Token JWT signatures, issuers, or audiences. A remote attacker can exploit this by crafting ...

Improper Authentication

Overview Affected versions of this package are vulnerable to Improper Authentication due to the SkipClientIDCheck configuration in the OIDC authentication provider, which disables audience claim validation. An attacker can gain unauthorized access by presenting a token issued for a different...

CVE-2026-40946

Oxia is a metadata store and coordination system. Prior to 0.16.2, the OIDC authentication provider unconditionally sets SkipClientIDCheck: true in the go-oidc verifier configuration, disabling the standard audience aud claim validation at the library level. This allows tokens issued for unrelate...

EUVD-2026-24512

Oxia is a metadata store and coordination system. Prior to 0.16.2, the OIDC authentication provider unconditionally sets SkipClientIDCheck: true in the go-oidc verifier configuration, disabling the standard audience aud claim validation at the library level. This allows tokens issued for unrelate...

CVE-2026-40946 Oxia: OIDC token audience validation bypass via SkipClientIDCheck

Oxia is a metadata store and coordination system. Prior to 0.16.2, the OIDC authentication provider unconditionally sets SkipClientIDCheck: true in the go-oidc verifier configuration, disabling the standard audience aud claim validation at the library level. This allows tokens issued for unrelate...

CVE-2026-40946

Oxia (metadata store and coordination system) prior to version 0.16.2 allows OIDC tokens to bypass standard audience validation. The root cause is that the OIDC authentication provider unconditionally sets SkipClientIDCheck: true in the go-oidc verifier configuration, disabling aud claim validati...

CVE-2026-40946 Oxia: OIDC token audience validation bypass via SkipClientIDCheck

Oxia is a metadata store and coordination system. Prior to 0.16.2, the OIDC authentication provider unconditionally sets SkipClientIDCheck: true in the go-oidc verifier configuration, disabling the standard audience aud claim validation at the library level. This allows tokens issued for unrelate...