better-auth

Discord · Website · Issues Better Auth Better Auth is a framework-agnostic authentication and authorization framework for TypeScript. It provides a comprehensive set of features out of the box and includes a plugin ecosystem that simplifies adding advanced functionalities with minimal code in a...

EUVD-2026-101747

Better Auth from 1.5.0-beta.12 before 1.7.7 contains an authentication bypass vulnerability in the OAuth Proxy plugin that allows unauthenticated attackers to sign in as other users by forging encrypted profiles. When the proxy shares the global secret and cookie-stored state is used, attackers c...

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'...

EUVD-2026-101744

Better Auth @better-auth/drizzle-adapter and better-auth from 1.6.17 before 1.7.7, and @better-auth/kysely-adapter from 1.6.17 before 1.7.0, contain a race condition in database-backed rate limiting on PostgreSQL where the limit check is not atomic with the counter update. Remote attackers can se...

EUVD-2026-101745

Better Auth from 1.4.0-beta.18 before 1.7.7 contains an authentication bypass vulnerability that allows unauthenticated attackers to sign in as other users by reusing OAuth state values as Magic Link tokens. Attackers can start an OAuth sign-in with a victim's email and submit the returned state ...

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-2026-110861

Better Auth @better-auth/drizzle-adapter and better-auth from 1.6.17 before 1.7.7, and @better-auth/kysely-adapter from 1.6.17 before 1.7.0, contain a race condition in database-backed rate limiting on PostgreSQL where the limit check is not atomic with the counter update. Remote attackers can se...

CVE-2026-110862

Better Auth from 1.4.0-beta.18 before 1.7.7 contains an authentication bypass vulnerability that allows unauthenticated attackers to sign in as other users by reusing OAuth state values as Magic Link tokens. Attackers can start an OAuth sign-in with a victim's email and submit the returned state ...

CVE-2026-110864

Better Auth from 1.5.0-beta.12 before 1.7.7 contains an authentication bypass vulnerability in the OAuth Proxy plugin that allows unauthenticated attackers to sign in as other users by forging encrypted profiles. When the proxy shares the global secret and cookie-stored state is used, attackers c...

CVE-2026-110864

The Better Auth framework (versions 1.5.0-beta.12 before 1.7.7 ) contains an authentication bypass vulnerability within the OAuth Proxy plugin . The root cause is that attackers can forge encrypted profiles when the proxy shares a global secret and uses cookie-stored state. By obtaining an encryp...

CVE-2026-110864 Better Auth 1.5.0-beta.12 before 1.7.7 Authentication Bypass via OAuth Proxy

Better Auth from 1.5.0-beta.12 before 1.7.7 contains an authentication bypass vulnerability in the OAuth Proxy plugin that allows unauthenticated attackers to sign in as other users by forging encrypted profiles. When the proxy shares the global secret and cookie-stored state is used, attackers c...

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 ...

CVE-2026-110862

The Better Auth library (versions 1.4.0-beta.18 before 1.7.7 ) is vulnerable to an authentication bypass via Magic Links. The root cause is the reuse of OAuth state values as Magic Link tokens . An unauthenticated attacker can initiate an OAuth sign-in using a victim's email address and subsequen...

CVE-2026-110862 Better Auth 1.4.0-beta.18 before 1.7.7 Authentication Bypass via Magic Link

Better Auth from 1.4.0-beta.18 before 1.7.7 contains an authentication bypass vulnerability that allows unauthenticated attackers to sign in as other users by reusing OAuth state values as Magic Link tokens. Attackers can start an OAuth sign-in with a victim's email and submit the returned state ...

CVE-2026-110861

The Better Auth library, specifically the @better-auth/drizzle-adapter (versions 1.6.17 to 1.7.7), better-auth (versions 1.6.17 to 1.7.7), and @better-auth/kysely-adapter (versions 1.6.17 to 1.7.0), contains a race condition in its database-backed rate limiting when used with PostgreSQL . The roo...

EUVD-2026-97648

better-auth from 1.3.8-beta.3 before 1.7.0-rc.3 contains a UI misrepresentation vulnerability in the deviceAuthorization plugin because GET /device omits the requesting clientid and scope. Attackers can start a device request via /device/code, trick signed-in users into approving the code, then...

CVE-2026-109346 better-auth 1.3.8-beta.3 before 1.7.0-rc.3 Device Authorization Phishing via /device

better-auth from 1.3.8-beta.3 before 1.7.0-rc.3 contains a UI misrepresentation vulnerability in the deviceAuthorization plugin because GET /device omits the requesting clientid and scope. Attackers can start a device request via /device/code, trick signed-in users into approving the code, then...

CVE-2026-109346

The better-auth library versions 1.3.8-beta.3 before 1.7.0-rc.3 is vulnerable to a UI misrepresentation issue within the deviceAuthorization plugin. The root cause is that the GET /device endpoint fails to include the requesting client_id and scope . This allows an attacker to initiate a device r...

better-auth v1.7.3

Discord · Website · Issues Better Auth Better Auth is a framework-agnostic authentication and authorization framework for TypeScript. It provides a comprehensive set of features out of the box and includes a plugin ecosystem that simplifies adding advanced functionalities with minimal code in a...

EUVD-2026-66214

@better-auth/sso before 1.6.27 and before 1.4.8 in the 1.4.x line and before 1.7.0-rc.5 in the 1.7 prerelease line contains two domain-ownership flaws. When domain verification is disabled, automatic organization assignment accepts unverified provider domains, allowing an authenticated organizati...