npm Package Vulnerabilities
Vulnerabilities associated with better-auth.
Packages
Clear package- openclaw588 vulnerabilities
- n8n139 vulnerabilities
- parse-server116 vulnerabilities
- flowise112 vulnerabilities
- electron65 vulnerabilities
- next64 vulnerabilities
- directus58 vulnerabilities
- nocodb54 vulnerabilities
- hono47 vulnerabilities
- axios43 vulnerabilities
- vm243 vulnerabilities
- ghost41 vulnerabilities
- @budibase/server40 vulnerabilities
- undici35 vulnerabilities
- flowise-components29 vulnerabilities
- @anthropic-ai/claude-code28 vulnerabilities
- dompurify28 vulnerabilities
- pnpm28 vulnerabilities
- astro25 vulnerabilities
- @openzeppelin/contracts-upgradeable22 vulnerabilities
- better-auth22 vulnerabilities
- vite22 vulnerabilities
- @openzeppelin/contracts21 vulnerabilities
- fuxa-server21 vulnerabilities
- nuxt21 vulnerabilities
| Vulnerability | Title and context | CVSS | EPSS | PoCs | Signals | STIX action |
|---|---|---|---|---|---|---|
Better Auth: Account takeover via pre-account hijacking on magic-link and email-OTP sign-in### Am I affected You are affected if all of the following hold: - You run a `better-auth` version below 1.6.22, or a `1.7.0-beta` below `1.7.0-beta.10`. - You enable the magic-link plugin or the email-OTP plugin. - You also enable email and password sign-up with open registration. - An account can exist at an address before its owner first signs in with the passwordless flow. ### Summary An attacker can keep password access to a victim's account after the victim starts using it. The attack … | CVSS-v3.1 | EPSS- | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX | |
Better Auth OAuth Provider: Refresh Token Rotation Race Condition Allows Concurrent Replay and Token Family ForkingBetter Auth is an authentication and authorization library for TypeScript. From 1.4.8-beta.7 until 1.6.11, the @better-auth/oauth-provider POST /oauth2/token endpoint on the refresh_token grant performs a non-atomic read, validate, revoke, and mint sequence on the oauthRefreshToken row, allowing concurrent requests with the same parent refresh token to pass the revoked check and create forked refresh-token families; the vulnerable range also includes embedded better-auth plugin versions before 1… | CVSS-v4.0 | EPSS0.24% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX | |
CVE-2026-45337HIGH | Better Auth: Device authorization approve and deny accept any authenticated session while the user code is pendingBetter Auth is an authentication and authorization library for TypeScript. From 1.6.0 until 1.6.11, the deviceAuthorization plugin treats any authenticated session as the owner of any pending device code because GET /device does not claim the row and POST /device/approve and POST /device/deny short-circuit when userId is unset, allowing an authenticated attacker who learns a valid user_code to bind the polling device to the attacker's account or deny the legitimate flow. This issue is fixed in v… | CVSS7.6v3.1 | EPSS0.14% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2026-53514HIGH | Better Auth: Unauthorized invitation acceptance via unverified email match in organization pluginBetter Auth is an authentication and authorization library for TypeScript. Prior to 1.6.11, and in 1.6.14 and later when invitation IDs can be obtained outside the invited mailbox and requireEmailVerificationOnInvitation: true is not enabled, the organization plugin's acceptInvitation, rejectInvitation, getInvitation, and listUserInvitations recipient endpoints use session.user.email and an invitation ID without sufficient verified-email ownership proof, allowing a user with an unverified sessio… | CVSS7.7v3.1 | EPSS0.139% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2026-53512CRITICAL | Better Auth: OAuth refresh-token replay via missing client authentication on oidc-provider and mcp pluginsBetter Auth is an authentication and authorization library for TypeScript. Prior to 1.6.11, the legacy oidcProvider and mcp plugins expose OAuth token endpoints whose refresh_token grant authenticates only possession of the bound refreshToken row and matching client_id, without verifying the confidential client's client_secret, allowing an attacker with a valid refresh_token to mint access tokens and rotated refresh tokens through /api/auth/oauth2/token or /api/auth/mcp/token. The @better-auth/o… | CVSS9.1v4.0 | EPSS0.213% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2026-53518HIGH | Better Auth OAuth Provider: Race Condition in Authorization Code Exchange Enables Multi-Use Code RedemptionBetter Auth is an authentication and authorization library for TypeScript. From 1.6.0 until 1.6.11, the @better-auth/oauth-provider POST /oauth2/token endpoint for the authorization_code grant redeems a single-use authorization code through a non-atomic find-then-delete sequence, allowing two concurrent requests to pass the read step and mint independent access tokens, refresh tokens, and ID tokens; legacy /oauth2/token and /mcp/token paths in oidc-provider and mcp plugins share the same primiti… | CVSS7.6v4.0 | EPSS0.229% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2026-53516HIGH | Better Auth: Account takeover via OAuth auto-link to unverified pre-registered emailBetter Auth is an authentication and authorization library for TypeScript. Prior to 1.6.11, Better Auth's OAuth callback auto-link gate in handleOAuthUserInfo accepts implicit account linking when the OAuth provider asserts email_verified: true without requiring the local user row's emailVerified field to also be true, allowing an attacker who pre-registers a victim email through /sign-up/email to bind the victim's OAuth identity to the attacker's account. The same primitive affects one-tap, and… | CVSS8.3v3.1 | EPSS0.152% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
Better Auth: Stale sessions persist after user deletion across admin, anonymous, and SCIM flows### Am I affected? Users are affected if all of the following are true: - They configure `secondaryStorage` on `betterAuth(...)` (Redis, KV, or any external session cache). - `session.storeSessionInDatabase` is left unset or set to `false` (the default). - Their application's deployment uses one or more of: - The `admin` plugin and calls `auth.api.removeUser(...)` or `authClient.admin.removeUser(...)`. - The `anonymous` plugin and exposes `/delete-anonymous-user` or relies on the after-lin… | CVSS-v3.1 | EPSS- | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX | |
Better Auth has insecure cryptographic defaults in oidcProvider: alg=none advertised and plain PKCE accepted by default### Am I affected? Users are affected if all of the following are true: - Their application uses `better-auth` at a version below the patched release. - Their application enables `oidcProvider()` from `better-auth/plugins/oidc-provider` or `mcp()` from `better-auth/plugins/mcp` (the mcp plugin delegates to `oidcProvider` and inherits both defaults). - For the algorithm-negotiation impact: relying parties of the application's OIDC server use a JWT verification library that performs algorithm ne… | CVSS-v3.1 | EPSS- | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX | |
Better Auth has stored XSS in the auth-server origin via javascript: redirect_uri in oidc-provider and mcp### Am I affected? Check each condition. Users are affected when all of the first three hold. - Their application enables the `oidc-provider` plugin or the `mcp` plugin from `better-auth/plugins`. The `mcp` plugin wraps the same provider and carries the same defect. Both are on the migration path to `@better-auth/oauth-provider`, which is not affected. - Their application `better-auth` version is `1.6.12` or earlier on the stable line, or any `1.7.0-beta` build on the pre-release line. Both re… | CVSS-v3.1 | EPSS- | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX | |
CVE-2026-45364HIGH | Better Auth: Rate limiter keys IPv6 addresses individually and is bypassable via prefix rotationBetter Auth is an authentication and authorization library for TypeScript. Prior to 1.4.17 and 1.5.0-beta.9, Better Auth's HTTP rate limiter keyed each request by the exact textual IP address it received in x-forwarded-for (or the configured IP-bearing header). IPv6 clients controlling a typical /64 allocation could rotate through 2^64 distinct source addresses without exhausting the per-address counter, defeating rate limiting on /sign-in/email, /sign-up/email, /forget-password, and every other… CWE-307May 28, 2026 | CVSS7.3v3.1 | EPSS0.295% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
Better Auth: OAuth callback accepts mismatched `state` when cookie-backed state storage is used without PKCE### Am I affected? Users are affected if all of the following are true: - The application uses `better-auth` at a version below `1.6.2` (or `@better-auth/sso` paired with such a version). - `betterAuth({ account: { storeStateStrategy } })` is set to `"cookie"`. The default `"database"` is not affected. - The application wires at least one OAuth provider through `genericOAuth({ config })` with `pkce: false`, or it supplies a custom `getToken` or `tokenUrl` that does not require the stored `code… | CVSS-v3.1 | EPSS- | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX | |
Better Auth Has Two-Factor Authentication Bypass via Premature Session Caching (session.cookieCache)### Summary Under certain configurations, sessions may be considered valid before two-factor authentication (2FA) is fully completed. This can allow access to authenticated routes without verifying the second factor. --- ### Description When two-factor authentication is enabled, the authentication flow correctly identifies users who require additional verification and defers full authentication until the second factor is completed. However, when `session.cookieCache` is enabled, the session… CWE-288Apr 3, 2026 | CVSS-v4.0 | EPSS- | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX | |
Better Auth's rou3 Dependency has Double-Slash Path Normalization which can Bypass disabledPaths Config and Rate Limits## Summary An issue in the underlying router library **rou3** can cause `/path` and `//path` to be treated as identical routes. If your environment does **not** normalize incoming URLs (e.g., by collapsing multiple slashes), this can allow bypasses of `disabledPaths` and path-based rate limits. ## Details Better Auth uses **better-call**, which internally relies on **rou3** for routing. Affected versions of rou3 normalize paths by removing empty segments. As a result: * `/sign-in/email` * `/… | CVSS-v3.1 | EPSS- | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX | |
Better Auth affected by external request basePath modification DoS# Summary Affected versions of Better Auth allow an external request to configure `baseURL` when it isn’t defined through any other means. This can be abused to poison the router’s base path, causing all routes to return 404 for all users. This issue is only exploitable when `baseURL` is not explicitly configured (e.g., `BETTER_AUTH_URL` is missing) *and* the attacker is able to make the very first request to the server after startup. In properly configured environments or typical managed host… CWE-73Dec 1, 2025 | CVSS-v4.0 | EPSS- | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX | |
Better Auth's multi-session sign-out hook allows forged cookies to revoke arbitrary sessions### Summary A vulnerability was identified in the multi-session plugin for Better Auth, specifically in the /sign-out after-hook. The hook trusts raw multi-session cookies and forwards the extracted values directly to internalAdapter.deleteSessions without verifying the cookie signature. Because cookie values are not validated with getSignedCookie (or any equivalent check), an attacker can supply a forged _multi-* cookie to trigger deletion of arbitrary session tokens. | CVSS-v4.0 | EPSS- | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX | |
CVE-2025-61928CRITICAL | Better Auth: Unauthenticated API key creation through api-key pluginBetter Auth is an authentication and authorization library for TypeScript. In versions prior to 1.3.26, unauthenticated attackers can create or modify API keys for any user by passing that user's id in the request body to the `api/auth/api-key/create` route. `session?.user ?? (authRequired ? null : { id: ctx.body.userId })`. When no session exists but `userId` is present in the request body, `authRequired` becomes false and the user object is set to the attacker-controlled ID. Server-only field … | CVSS9.3v4.0 | EPSS17.9% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
Better Auth has an Open Redirect Vulnerability in originCheck Middleware Affecting Multiple RoutesBetter Auth is an authentication and authorization library for TypeScript. An open redirect has been found in the originCheck middleware function, which affects the following routes: /verify-email, /reset-password/:token, /delete-user/callback, /magic-link/verify, /oauth-proxy-callback. This vulnerability is fixed in 1.2.10. CWE-601Jul 7, 2025 | CVSS2.1v4.0 | EPSS0.334% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX | |
CVE-2025-27143MEDIUM | Beter Auth has an Open Redirect via Scheme-Less Callback ParameterBetter Auth is an authentication and authorization library for TypeScript. Prior to version 1.1.21, the application is vulnerable to an open redirect due to improper validation of the callbackURL parameter in the email verification endpoint and any other endpoint that accepts callback url. While the server blocks fully qualified URLs, it incorrectly allows scheme-less URLs. This results in the browser interpreting the URL as a fully qualified URL, leading to unintended redirection. An attacker c… CWE-601Feb 24, 2025 | CVSS6.9v4.0 | EPSS0.338% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
Better Auth allows bypassing the trustedOrigins Protection which leads to ATO### Summary A bypass was discovered in the trustedOrigins validation logic—affecting both absolute URL entries and wildcard domain patterns. This flaw allows an attacker to construct a malicious callbackURL that passes origin checks and triggers an open redirect. Because redirect endpoints include sensitive tokens (such as password-reset tokens), this vulnerability can enable one-click account takeover if a victim clicks a crafted link. CWE-601Feb 24, 2025 | CVSS-v3.1 | EPSS- | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX | |
Better Auth URL parameter HTML Injection (Reflected Cross-Site scripting)### Summary The better-auth `/api/auth/error` page was vulnerable to HTML injection, resulting in a reflected cross-site scripting (XSS) vulnerability. ### Details The value of `error` URL parameter was reflected as HTML on the error page: https://github.com/better-auth/better-auth/blob/05ada0b79dbcac93cc04ceb79b23ca598d07830c/packages/better-auth/src/api/routes/error.ts#L81 ### Impact An attacker who exploited this vulnerability by coercing a user to visit a specially-crafted URL could execut… CWE-79Feb 5, 2025 | CVSS-v4.0 | EPSS- | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX | |
CVE-2024-56734HIGH | Better Auth has an Open Redirect Vulnerability in Verify Email EndpointBetter Auth is an authentication library for TypeScript. An open redirect vulnerability has been identified in the verify email endpoint of all versions of Better Auth prior to v1.1.6, potentially allowing attackers to redirect users to malicious websites. This issue affects users relying on email verification links generated by the library. The verify email callback endpoint accepts a `callbackURL` parameter. Unlike other verification methods, email verification only uses JWT to verify and redi… CWE-601Dec 30, 2024 | CVSS7.9v4.0 | EPSS0.396% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |