CVE-2026-54431

A flaw was found in liboauth2. The Demonstrating Proof-of-Possession DPoP verifier incorrectly accepts a malformed DPoP proof. This proof contains private key material in its JSON Web Key JWK header, which should be rejected according to RFC 9449. This vulnerability could allow an attacker to...

CVE-2026-54431

In liboauth2 the Demonstrating Proof-of-Possession DPoP verifier accepts a proof whose JSON Web Key jwk header contains private key material. RFC 9449 section 4.3 step 7 requires the verifier to reject such a proof but oauth2tokenverify function returns success for a malformed DPoP proof that...

CVE-2026-54431

CVE-2026-54431 affects the liboauth2 DPoP verifier. The bug allows a DPoP proof whose JWK header embeds private key material to be accepted, violating RFC 9449 section 4.3 step 7, because the function oauth2_token_verify() returns success for a malformed DPoP proof that embeds the private EC key ...

CVE-2026-54431 Improper Data Validation in liboauth2

In liboauth2 the Demonstrating Proof-of-Possession DPoP verifier accepts a proof whose JSON Web Key jwk header contains private key material. RFC 9449 section 4.3 step 7 requires the verifier to reject such a proof but oauth2tokenverify function returns success for a malformed DPoP proof that...

CVE-2026-54431

In liboauth2 the Demonstrating Proof-of-Possession DPoP verifier accepts a proof whose JSON Web Key jwk header contains private key material. RFC 9449 section 4.3 step 7 requires the verifier to reject such a proof but oauth2tokenverify function returns success for a malformed DPoP proof that...

Auth0 Next.js SDK has Improper Proxy Cache Lookup

Description In affected versions of the Next.js SDK, simultaneous requests that trigger a nonce retry may cause the proxy cache fetcher to perform improper lookups for the token request results. Which Projects are Affected? Users are affected if they meet all of the following preconditions: -...

CVE-2026-40155

The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications. In versions 4.12.0 through 4.17.1, simultaneous requests that trigger a nonce retry may cause the proxy cache fetcher to perform improper lookups for the token request results. Users are affected if...

Incorrect Authorization

Overview @auth0/nextjs-auth0 is a Next.js SDK for signing in with Auth0 Affected versions of this package are vulnerable to Incorrect Authorization in the proxy cache fetcher. An attacker can gain unauthorized access to sensitive information or perform actions with insufficient authorization by...

Duende IdentityServer 授权问题漏洞

Duende IdentityServer is a Duende open source, standards-compliant OpenID Connect and OAuth 2.x framework for ASP.NET Core. An authorization issue vulnerability exists in Duende IdentityServer version 7.0.0 and earlier, which stems from insufficient validation performed by the local API...

PT-2024-33666 · Duende · Duende Identityserver

Name of the Vulnerable Software and Affected Versions: Duende IdentityServer versions 7.0.0 through 7.0.7 Description: The local API authentication handler in Duende IdentityServer performs insufficient validation of the cnf claim in DPoP access tokens. This allows an attacker to use leaked DPoP...