CVE-2026-110863

A flaw was found in @better-auth/sso. An authenticated attacker can exploit this vulnerability to bypass authentication and gain unauthorized access to other user accounts by registering a custom Single Sign-On SSO provider. Because the application ignores the provider identifier during account...

EUVD-2026-101746

Better Auth @better-auth/sso from 1.7.0-rc.2 before 1.7.3 contains an authentication bypass vulnerability that allows authenticated users to sign in as other users by registering a personal SSO provider. Attackers can copy a legitimate provider's OIDC issuer or SAML entity ID and assert a victim'...

CVE-2026-110863

Better Auth @better-auth/sso from 1.7.0-rc.2 before 1.7.3 contains an authentication bypass vulnerability that allows authenticated users to sign in as other users by registering a personal SSO provider. Attackers can copy a legitimate provider's OIDC issuer or SAML entity ID and assert a victim'...

CVE-2026-110863 Better Auth @better-auth/sso before 1.7.3 Authentication Bypass via Personal SSO Providers

Better Auth @better-auth/sso from 1.7.0-rc.2 before 1.7.3 contains an authentication bypass vulnerability that allows authenticated users to sign in as other users by registering a personal SSO provider. Attackers can copy a legitimate provider's OIDC issuer or SAML entity ID and assert a victim'...

CVE-2026-110863

The @better-auth/sso library (versions 1.7.0-rc.2 before 1.7.3 ) contains an authentication bypass vulnerability. The root cause is that the account lookup mechanism ignores the providerId , allowing an authenticated attacker to register a personal SSO provider using a legitimate provider's OIDC ...

PT-2026-114177

Better Auth @better-auth/sso from 1.7.0-rc.2 before 1.7.3 contains an authentication bypass vulnerability that allows authenticated users to sign in as other users by registering a personal SSO provider. Attackers can copy a legitimate provider's OIDC issuer or SAML entity ID and assert a victim'...

CVE-2026-110863: Improper Authentication

Better Auth @better-auth/sso from 1.7.0-rc.2 before 1.7.3 contains an authentication bypass vulnerability that allows authenticated users to sign in as other users by registering a personal SSO provider. Attackers can copy a legitimate provider's OIDC issuer or SAML entity ID and assert a victim'...

CVE-2026-101149 Security Advisory 0186

Insufficient validation of OIDC SSO provider configuration could allow a user with specific high privileges to direct requests to arbitrary destinations...

CVE-2026-101149

A vulnerability exists due to insufficient validation of OIDC SSO provider configuration . This flaw could allow a user with specific high privileges to perform a Server-Side Request Forgery (SSRF) by directing requests to arbitrary destinations. No specific software versions, affected components...

CVE-2026-101149: Server-Side Request Forgery (SSRF)

Insufficient validation of OIDC SSO provider configuration could allow a user with specific high privileges to direct requests to arbitrary destinations...

PT-2026-107131

Insufficient validation of OIDC SSO provider configuration could allow a user with specific high privileges to direct requests to arbitrary destinations...

PT-2026-97857

Name of the Vulnerable Software and Affected Versions Logto versions 1.31.0 through 1.41.0 Description Account API handlers in packages/core/src/routes/account/third-party-tokens.ts allow a caller with a same-user access token containing only the openid scope to retrieve stored social or enterpri...

CVE-2026-88864

Capgo capgo.app fails to restrict direct write access to the public.ssoproviders table exposed through Supabase PostgREST. A holder of an ordinary Capgo full API key can insert a row with status='active' and enforcesso=true, bypassing the intended backend SSO provisioning route...

CVE-2026-88864 Capgo SSO Provider Authentication Bypass via PostgREST Direct Write

Capgo capgo.app fails to restrict direct write access to the public.ssoproviders table exposed through Supabase PostgREST. A holder of an ordinary Capgo full API key can insert a row with status='active' and enforcesso=true, bypassing the intended backend SSO provisioning route...

CVE-2026-88864 Capgo SSO Provider Authentication Bypass via PostgREST Direct Write

Capgo capgo.app fails to restrict direct write access to the public.ssoproviders table exposed through Supabase PostgREST. A holder of an ordinary Capgo full API key can insert a row with status='active' and enforcesso=true, bypassing the intended backend SSO provisioning route...

CVE-2026-67328

@better-auth/sso versions before 1.6.21 contain multiple authentication bypass vulnerabilities in SSO provider handling that allow attackers to sign in as arbitrary users. Attackers can exploit domain verification parsing mismatches, orphaned provider accounts, unbound SAML assertions, or reflect...

CVE-2026-67328: Improper Neutralization of Input During Web Page Generation

@better-auth/sso versions before 1.6.21 contain multiple authentication bypass vulnerabilities in SSO provider handling that allow attackers to sign in as arbitrary users. Attackers can exploit domain verification parsing mismatches, orphaned provider accounts, unbound SAML assertions, or reflect...

CVE-2026-53515

Better Auth is an authentication and authorization library for TypeScript. From 1.2.10 until 1.6.11, the @better-auth/sso plugin's POST /sso/register endpoint lets any organization member attach a new SSO provider to that organization because registerSSOProvider checks only for a membership row a...

CVE-2026-53515 Better Auth: Privilege escalation via SSO provider registration: missing admin role check in @better-auth/sso

Better Auth is an authentication and authorization library for TypeScript. From 1.2.10 until 1.6.11, the @better-auth/sso plugin's POST /sso/register endpoint lets any organization member attach a new SSO provider to that organization because registerSSOProvider checks only for a membership row a...

CVE-2026-53515

Better Auth is an authentication and authorization library for TypeScript. From 1.2.10 until 1.6.11, the @better-auth/sso plugin's POST /sso/register endpoint lets any organization member attach a new SSO provider to that organization because registerSSOProvider checks only for a membership row a...