Improper Certificate Validation

Overview Affected versions of this package are vulnerable to Improper Certificate Validation in the isEmailConstrained and isURIConstrained methods of PKIXNameConstraintValidator, which compare rfc822Name and URI subjectAltName values with a bare equalsIgnoreCase and do not strip a trailing dot t...

Improper Certificate Validation

Overview Affected versions of this package are vulnerable to Improper Certificate Validation in the isEmailConstrained and isURIConstrained methods of PKIXNameConstraintValidator, which compare rfc822Name and URI subjectAltName values with a bare equalsIgnoreCase and do not strip a trailing dot t...

Improper Input Validation

Overview Affected versions of this package are vulnerable to Improper Input Validation in the calculateAgreementpub, message method of the DHAgreement class, which raises the peer-supplied message to the power of the local static private key x without any range or subgroup-membership check, while...

Measuring Post-Quantum TLS Deployment across UK Internet Sectors

Post-quantum cryptography PQC is becoming an important component of long-term trust in Internet-facing infrastructure. Publicly observable PQC support provides evidence of externally visible deployment, but does not necessarily reflect the overall progress of an organisation's post-quantum...

Authorization Bypass Through User-Controlled Key

Overview @better-auth/scim is a SCIM plugin for Better Auth Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key via SCIM token issuance and user resolution in the SCIM routes. An authenticated user can act on SCIM-managed accounts owned by another...

CVE-2026-67336

better-auth versions before 1.6.11 contain insecure cryptographic defaults in the oidcProvider and mcp plugins that advertise the none algorithm and accept plain PKCE by default. Attackers can exploit algorithm negotiation to accept unsigned tokens or intercept authorization codes when PKCE plain...

CVE-2026-67330

@better-auth/scim a better-auth plugin versions = 1.4.0-beta.27 through = 1.7.0-beta.0 through = 1.7.0-beta.9 contain an authorization bypass. SCIM token issuance did not reject provider IDs already used by existing SSO, SAML, OIDC, generic OAuth, or social account providers, and the same logical...

CVE-2026-67331

better-auth SCIM versions from 1.5.0 before 1.7.0-beta.4 fail to bind non-organization SCIM providers to their creator by default, allowing authenticated users to manage other users' providers. Attackers can regenerate SCIM bearer tokens, invalidate legitimate tokens, and authenticate to SCIM API...

EUVD-2026-51816

better-auth versions before 1.6.11 contain insecure cryptographic defaults in the oidcProvider and mcp plugins that advertise the none algorithm and accept plain PKCE by default. Attackers can exploit algorithm negotiation to accept unsigned tokens or intercept authorization codes when PKCE plain...

CVE-2026-67333

better-auth before 1.6.13 and pre-release builds 1.7.0-beta.0 through 1.7.0-beta.3 fail to validate the scheme of redirecturis registered via the deprecated oidc-provider plugin and the mcp plugin which wraps the same provider. An attacker can register an OAuth client with a javascript:...

EUVD-2026-51836

@better-auth/oauth-provider before 1.7.0-beta.4 fails to bind access-token audience to the authorization grant, allowing clients to request tokens for unrelated resources. Attackers can complete an OAuth flow and obtain access tokens whose audience targets resource servers the authorization never...

CVE-2026-67332

@better-auth/oauth-provider before 1.7.0-beta.4 fails to bind access-token audience to the authorization grant, allowing clients to request tokens for unrelated resources. Attackers can complete an OAuth flow and obtain access tokens whose audience targets resource servers the authorization never...

EUVD-2026-51810

better-auth before 1.6.13 and pre-release builds 1.7.0-beta.0 through 1.7.0-beta.3 fail to validate the scheme of redirecturis registered via the deprecated oidc-provider plugin and the mcp plugin which wraps the same provider. An attacker can register an OAuth client with a javascript:...

CVE-2026-67336

better-auth versions before 1.6.11 contain insecure cryptographic defaults in the oidcProvider and mcp plugins that advertise the none algorithm and accept plain PKCE by default. Attackers can exploit algorithm negotiation to accept unsigned tokens or intercept authorization codes when PKCE plain...

CVE-2026-67332 @better-auth/oauth-provider before 1.7.0-beta.4 Authorization Bypass

@better-auth/oauth-provider before 1.7.0-beta.4 fails to bind access-token audience to the authorization grant, allowing clients to request tokens for unrelated resources. Attackers can complete an OAuth flow and obtain access tokens whose audience targets resource servers the authorization never...

CVE-2026-67336

CVE-2026-67336 affects better-auth versions before 1.6.11, specifically the oidcProvider and mcp plugins. The root cause is insecure cryptographic defaults that advertise the none algorithm and allow plain PKCE by default. This can enable an attacker to exploit algorithm negotiation to accept uns...

CVE-2026-67332 @better-auth/oauth-provider before 1.7.0-beta.4 Authorization Bypass

@better-auth/oauth-provider before 1.7.0-beta.4 fails to bind access-token audience to the authorization grant, allowing clients to request tokens for unrelated resources. Attackers can complete an OAuth flow and obtain access tokens whose audience targets resource servers the authorization never...

CVE-2026-67332

Technical details (affected products/versions/mitigation) are not publicly provided in the supplied documents. Monitor for updates.

CVE-2026-67332 @better-auth/oauth-provider before 1.7.0-beta.4 Authorization Bypass

@better-auth/oauth-provider before 1.7.0-beta.4 fails to bind access-token audience to the authorization grant, allowing clients to request tokens for unrelated resources. Attackers can complete an OAuth flow and obtain access tokens whose audience targets resource servers the authorization never...

CVE-2026-67336 better-auth before 1.6.11 Insecure Cryptographic Defaults via oidcProvider

better-auth versions before 1.6.11 contain insecure cryptographic defaults in the oidcProvider and mcp plugins that advertise the none algorithm and accept plain PKCE by default. Attackers can exploit algorithm negotiation to accept unsigned tokens or intercept authorization codes when PKCE plain...