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80 vulnerabilities by better-auth
CVE-2026-121802 (GCVE-0-2026-121802)
Vulnerability from nvd – Published: 2026-11-04 02:36 – Updated: 2026-11-06 18:45
VLAI
EPSS
VEX
Summary
@better-auth/expo before 1.7.16 allows certain account-takeover outcomes (e.g., unauthenticated changes of any account's email address), because it signs a caller-supplied state value without checking whether that value had been issued by the server. NOTE: the application secret must be rotated after updating to a fixed version.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-06 18:45 UTC
CWE
- CWE-346 - Origin Validation Error
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | Better Auth |
Affected:
0 , < 1.7.16
(semver)
cpe:2.3:a:better-auth:better_auth:*:*:*:*:*:*:*:* |
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CVE-2026-114607 (GCVE-0-2026-114607)
Vulnerability from nvd – Published: 2026-10-22 16:47 – Updated: 2026-10-23 15:02
VLAI
EPSS
VEX
Title
better-auth: OAuth state can be used as a Magic Link to sign in as another user
Summary
Better Auth is an authentication and authorization library for TypeScript. From 1.4.0-beta.18 until 1.7.7, deployments that enable Magic Link with storeToken set to plain, or with storeToken set to hashed and the global verification.storeIdentifier setting also set to hashed, enable a built-in social or Generic OAuth provider, and use account.storeStateStrategy set to database can accept an OAuth sign-in state value as a Magic Link token. These settings can cause Magic Link verification records and OAuth state to resolve to the same stored identifier, allowing an unauthenticated attacker to start OAuth sign-in for a known email address and redeem the returned state through Magic Link without controlling the mailbox or completing the provider callback. The attacker can obtain a normal session for an existing user, or create an account incorrectly marked as email verified when sign-up is enabled. This issue is fixed in version 1.7.7.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-23 14:55 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | x_refsource_CONFIRM |
| https://github.com/better-auth/better-auth/pull/11494 | x_refsource_MISC |
| https://github.com/better-auth/better-auth/commit… | x_refsource_MISC |
| https://github.com/better-auth/better-auth/releas… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | better-auth |
Affected:
>= 1.4.0-beta.18, < 1.7.7
|
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CVE-2026-110864 (GCVE-0-2026-110864)
Vulnerability from nvd – Published: 2026-10-14 22:52 – Updated: 2026-10-15 15:36
VLAI
EPSS
VEX
Title
Better Auth 1.5.0-beta.12 before 1.7.7 Authentication Bypass via OAuth Proxy
Summary
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 can obtain encrypted state for a fake profile with a victim's verified email to take over the account via implicit linking.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 15:35 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | better-auth |
Affected:
1.5.0-beta.12 , < 1.7.7
(semver)
Unaffected: 1.7.7 (semver) cpe:2.3:a:better-auth:better_auth:*:*:*:*:*:*:*:* |
Date Public
2026-09-30 00:00
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CVE-2026-110863 (GCVE-0-2026-110863)
Vulnerability from nvd – Published: 2026-10-14 22:52 – Updated: 2026-10-16 17:14
VLAI
EPSS
VEX
Title
Better Auth @better-auth/sso before 1.7.3 Authentication Bypass via Personal SSO Providers
Summary
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's subject or NameID, because account lookup ignores providerId, creating sessions for victim accounts.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 16:35 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | sso |
Affected:
1.7.0-rc.2 , < 1.7.3
(semver)
cpe:2.3:a:better-auth:better-auth\/sso:*:*:*:*:*:*:*:* |
Date Public
2026-09-29 00:00
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CVE-2026-110862 (GCVE-0-2026-110862)
Vulnerability from nvd – Published: 2026-10-14 22:52 – Updated: 2026-10-15 13:34
VLAI
EPSS
VEX
Title
Better Auth 1.4.0-beta.18 before 1.7.7 Authentication Bypass via Magic Link
Summary
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Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 13:33 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | better-auth |
Affected:
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(semver)
Unaffected: 1.7.7 (semver) cpe:2.3:a:better-auth:better_auth:*:*:*:*:*:*:*:* |
Date Public
2026-09-30 00:00
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CVE-2026-110861 (GCVE-0-2026-110861)
Vulnerability from nvd – Published: 2026-10-14 22:52 – Updated: 2026-10-20 02:26
VLAI
EPSS
VEX
Title
Better Auth drizzle-adapter 1.6.17 before 1.7.7 Rate Limit Bypass via Race Condition
Summary
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 send bursts of concurrent requests that pass the check together, exceeding configured limits on password sign-in, two-factor verification, one-time code, password reset, and other rate-limited endpoints.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-20 02:26 UTC
CWE
- CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | drizzle-adapter |
Affected:
1.6.17 , < 1.7.7
(semver)
Unaffected: 1.7.7 (semver) |
|
| better-auth | kysely-adapter |
Affected:
1.6.17 , < 1.7.0
(semver)
Unaffected: 1.7.0 (semver) |
|
| better-auth | better-auth |
Affected:
1.6.17 , < 1.7.7
(semver)
Unaffected: 1.7.7 (semver) |
Date Public
2026-09-30 00:00
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CVE-2026-109346 (GCVE-0-2026-109346)
Vulnerability from nvd – Published: 2026-10-12 16:05 – Updated: 2026-10-26 16:46
VLAI
EPSS
VEX
Title
better-auth 1.3.8-beta.3 before 1.7.0-rc.3 Device Authorization Phishing via /device
Summary
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 client_id and scope. Attackers can start a device request via /device/code, trick signed-in users into approving the code, then redeem it at /device/token for a live session token.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-26 16:35 UTC
CWE
- CWE-451 - User Interface (UI) Misrepresentation of Critical Information
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | better-auth |
Affected:
1.3.8-beta.3 , < 1.7.0-rc.3
(semver)
Unaffected: 1.7.0-rc.3 (semver) cpe:2.3:a:better-auth:better_auth:*:*:*:*:*:*:*:* |
Date Public
2026-09-28 00:00
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CVE-2026-80192 (GCVE-0-2026-80192)
Vulnerability from nvd – Published: 2026-08-25 23:19 – Updated: 2026-10-08 15:25
VLAI
EPSS
VEX
Title
better-auth SSO before 1.6.27 Domain Ownership Authentication Bypass
Summary
@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 organization owner/administrator to register an SSO provider for an arbitrary domain and have users with matching email domains added to the attacker's organization with default member permissions. When domain verification is enabled, a race condition between the verify-domain and update-provider endpoints can apply completed DNS proof to a different domain; combined with implicit account linking, this can link an attacker-controlled identity provider to an existing user account. Exploitation requires the SSO plugin (and, for the org-assignment path, the organization plugin) with the relevant configuration enabled.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 13:43 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | sso |
Affected:
1.4.8-beta.1 , < 1.4.8
(semver)
Unaffected: 1.4.8 (semver) |
|
| better-auth | sso |
Affected:
1.4.9 , < 1.6.27
(semver)
Unaffected: 1.6.27 (semver) |
|
| better-auth | sso |
Affected:
1.7.0-beta.0 , < 1.7.0-rc.5
(semver)
Unaffected: 1.7.0-rc.5 (semver) |
Date Public
2026-08-11 00:00
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CVE-2025-71401 (GCVE-0-2025-71401)
Vulnerability from nvd – Published: 2026-08-02 12:15 – Updated: 2026-08-03 14:29
VLAI
EPSS
VEX
Title
better-auth before 1.4.2 basePath Modification DoS
Summary
better-auth (npm) before 1.4.2 allows an external request to configure baseURL when it is not otherwise defined (e.g., BETTER_AUTH_URL is unset). An attacker able to make the very first request to the server after startup can poison the router's base path, causing all routes to return 404 for all users (denial of service). The issue is not reachable when baseURL is explicitly configured or on typical managed hosting platforms.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 14:29 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | better-auth |
Affected:
0 , < 1.4.2
(semver)
Unaffected: 1.4.2 (semver) cpe:2.3:a:better-auth:better-auth\/oauth-provider:*:*:*:*:*:node.js:*:* |
Date Public
2025-11-27 00:00
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CVE-2025-71400 (GCVE-0-2025-71400)
Vulnerability from nvd – Published: 2026-08-02 12:15 – Updated: 2026-10-08 15:21
VLAI
EPSS
VEX
Title
better-auth passkey before 1.4.0 IDOR via delete-passkey
Summary
better-auth passkey versions before 1.4.0 contain an insecure direct object reference vulnerability in the passkey deletion endpoint that allows authenticated users to delete arbitrary passkeys by ID. Attackers with valid sessions can submit crafted requests to the delete-passkey endpoint with enumerated passkey IDs to remove other users' passkeys.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 14:46 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | passkey |
Affected:
0 , < 1.4.0
(semver)
Unaffected: 1.4.0 (semver) cpe:2.3:a:better-auth:better-auth\/oauth-provider:*:*:*:*:*:node.js:*:* |
Date Public
2025-11-24 00:00
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CVE-2025-71399 (GCVE-0-2025-71399)
Vulnerability from nvd – Published: 2026-08-02 12:15 – Updated: 2026-10-08 15:21
VLAI
EPSS
VEX
Title
Better Auth before 1.4.5 Path Normalization Bypass via rou3
Summary
Better Auth relies on better-call, which uses the rou3 router library. In affected versions of rou3, paths are normalized by removing empty segments, so /path, //path, and ///path resolve to the same route. In Better Auth versions prior to 1.4.5 (which bundles the fixed rou3), this can allow attackers to bypass disabledPaths configuration and path-based rate limits by submitting requests with extra slashes in the URL path. The issue does not apply in deployments where the proxy or platform normalizes URLs by collapsing multiple slashes.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 15:48 UTC
CWE
- CWE-20 - Improper Input Validation
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://github.com/better-auth/better-auth/commit… | patch |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | better-auth |
Affected:
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2025-12-15 00:00
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CVE-2026-67337 (GCVE-0-2026-67337)
Vulnerability from nvd – Published: 2026-08-01 12:22 – Updated: 2026-08-03 18:31
VLAI
EPSS
VEX
Title
better-auth before 1.4.9 Two-Factor Authentication Bypass via session.cookieCache
Summary
better-auth versions before 1.4.9 contain a two-factor authentication bypass vulnerability when session.cookieCache is enabled. Attackers with valid primary credentials can access authenticated routes without completing second-factor verification by exploiting premature session caching.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 18:31 UTC
CWE
- CWE-288 - Authentication Bypass Using an Alternate Path or Channel
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | better-auth |
Affected:
0 , < 1.4.9
(semver)
Unaffected: 1.4.9 (semver) cpe:2.3:a:better-auth:better-auth\/oauth-provider:*:*:*:*:*:node.js:*:* |
Date Public
2026-04-01 00:00
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CVE-2026-67336 (GCVE-0-2026-67336)
Vulnerability from nvd – Published: 2026-08-01 12:22 – Updated: 2026-08-03 15:23
VLAI
EPSS
VEX
Title
better-auth before 1.6.11 Insecure Cryptographic Defaults via oidcProvider
Summary
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Severity
8.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 15:23 UTC
CWE
- CWE-327 - Use of a Broken or Risky Cryptographic Algorithm
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | better-auth |
Affected:
0 , < 1.6.11
(semver)
Unaffected: 1.6.11 (semver) cpe:2.3:a:better-auth:better-auth\/oauth-provider:*:*:*:*:*:node.js:*:* |
Date Public
2026-05-31 00:00
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CVE-2026-67335 (GCVE-0-2026-67335)
Vulnerability from nvd – Published: 2026-08-01 12:22 – Updated: 2026-08-03 15:38
VLAI
EPSS
VEX
Title
better-auth before 1.6.2 OAuth State Validation Bypass
Summary
better-auth versions before 1.6.2 fail to validate the OAuth state parameter against the stored nonce when using cookie-backed state storage without PKCE. Attackers can forge the state parameter and supply an attacker-controlled authorization code to create authenticated sessions bound to the attacker's external identity or persistently link attacker accounts to victim profiles.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 14:46 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | better-auth |
Affected:
0 , < 1.6.2
(semver)
Unaffected: 1.6.2 (semver) cpe:2.3:a:better-auth:better-auth\/oauth-provider:*:*:*:*:*:node.js:*:* |
Date Public
2026-05-11 00:00
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CVE-2026-67334 (GCVE-0-2026-67334)
Vulnerability from nvd – Published: 2026-08-01 12:22 – Updated: 2026-10-08 15:24
VLAI
EPSS
VEX
Title
better-auth Stale Sessions Persist After User Deletion
Summary
better-auth versions before 1.6.11 fail to delete cached sessions when removing users via admin, anonymous, or SCIM endpoints when secondaryStorage is configured and storeSessionInDatabase is false. Attackers can reuse deleted user session tokens to maintain authentication for up to seven days after account deletion.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 18:19 UTC
CWE
- CWE-459 - Incomplete Cleanup
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
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2 products
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | better-auth |
Affected:
0.3.4 , < 1.6.11
(semver)
Unaffected: 1.6.11 (semver) |
|
| better-auth | better-auth |
Affected:
1.6.0 , < 1.6.11
(semver)
Unaffected: 1.6.11 (semver) |
Date Public
2026-05-31 00:00
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CVE-2026-67333 (GCVE-0-2026-67333)
Vulnerability from nvd – Published: 2026-08-01 12:22 – Updated: 2026-08-03 19:43
VLAI
EPSS
VEX
Title
better-auth before 1.6.13 Stored XSS via javascript redirect_uri
Summary
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 redirect_uris 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: redirect_uri, which the authorization server later returns unchanged in the consent response. If the deployment's consent page navigates the browser to the returned redirectURI (e.g. assigning it to window.location.href), the attacker's JavaScript executes in the authorization-server origin, exposing the victim's session and enabling account takeover.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 19:42 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | better-auth |
Affected:
0 , < 1.6.13
(semver)
Unaffected: 1.6.13 (semver) |
|
| better-auth | better-auth |
Affected:
1.7.0-beta.0 , < 1.7.0-beta.4
(semver)
Unaffected: 1.7.0-beta.4 (semver) |
Date Public
2026-05-31 00:00
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CVE-2026-67332 (GCVE-0-2026-67332)
Vulnerability from nvd – Published: 2026-08-01 12:22 – Updated: 2026-10-08 15:24
VLAI
EPSS
VEX
Title
@better-auth/oauth-provider before 1.7.0-beta.4 Authorization Bypass
Summary
@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 covered, bypassing intended authorization boundaries.
Severity
6.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 18:31 UTC
CWE
- CWE-285 - Improper Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | oauth-provider |
Affected:
1.4.8 , < 1.7.0-beta.4
(semver)
Unaffected: 1.7.0-beta.4 (semver) cpe:2.3:a:better-auth:better-auth\/oauth-provider:*:*:*:*:*:node.js:*:* |
Date Public
2026-05-31 00:00
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CVE-2026-67331 (GCVE-0-2026-67331)
Vulnerability from nvd – Published: 2026-08-01 12:22 – Updated: 2026-10-08 15:24
VLAI
EPSS
VEX
Title
better-auth SCIM 1.5.0 before 1.7.0-beta.4 Authorization Bypass
Summary
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 routes with the attacker-controlled token.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 17:46 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | scim |
Affected:
1.5.0 , < 1.7.0-beta.4
(semver)
Unaffected: 1.7.0-beta.4 (semver) cpe:2.3:a:better-auth:better_auth:*:*:*:*:*:node.js:*:* |
Date Public
2026-05-31 00:00
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CVE-2026-67330 (GCVE-0-2026-67330)
Vulnerability from nvd – Published: 2026-08-01 12:22 – Updated: 2026-10-08 15:24
VLAI
EPSS
VEX
Title
better-auth SCIM 1.4.0-beta.27 through 1.6.21 Account Takeover via Provider-ID Collision
Summary
@better-auth/scim (a better-auth plugin) versions >= 1.4.0-beta.27 through <= 1.6.21 and >= 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 provider ID was used for both SCIM provider configuration and account ownership. An authenticated user could mint a SCIM token whose provider ID collided with an existing provider namespace, causing SCIM user routes to resolve account rows the token never provisioned. This allowed listing, reading, updating (including rewriting global profile/email fields without uniqueness checks), and deleting global user accounts and sessions, resulting in account takeover and unauthorized deprovisioning. Fixed in 1.6.22 and 1.7.0-beta.10 (1.7.0-rc.0).
Severity
9.9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 14:48 UTC
CWE
- CWE-20 - Improper Input Validation
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | scim |
Affected:
1.4.0-beta.27 , < *
(semver)
|
|
| better-auth | scim |
Affected:
1.7.0-beta.0 , < *
(semver)
|
Date Public
2026-06-26 00:00
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CVE-2026-121802 (GCVE-0-2026-121802)
Vulnerability from cvelistv5 – Published: 2026-11-04 02:36 – Updated: 2026-11-06 18:45
VLAI
EPSS
VEX
Summary
@better-auth/expo before 1.7.16 allows certain account-takeover outcomes (e.g., unauthenticated changes of any account's email address), because it signs a caller-supplied state value without checking whether that value had been issued by the server. NOTE: the application secret must be rotated after updating to a fixed version.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-06 18:45 UTC
CWE
- CWE-346 - Origin Validation Error
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | Better Auth |
Affected:
0 , < 1.7.16
(semver)
cpe:2.3:a:better-auth:better_auth:*:*:*:*:*:*:*:* |
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CVE-2026-114607 (GCVE-0-2026-114607)
Vulnerability from cvelistv5 – Published: 2026-10-22 16:47 – Updated: 2026-10-23 15:02
VLAI
EPSS
VEX
Title
better-auth: OAuth state can be used as a Magic Link to sign in as another user
Summary
Better Auth is an authentication and authorization library for TypeScript. From 1.4.0-beta.18 until 1.7.7, deployments that enable Magic Link with storeToken set to plain, or with storeToken set to hashed and the global verification.storeIdentifier setting also set to hashed, enable a built-in social or Generic OAuth provider, and use account.storeStateStrategy set to database can accept an OAuth sign-in state value as a Magic Link token. These settings can cause Magic Link verification records and OAuth state to resolve to the same stored identifier, allowing an unauthenticated attacker to start OAuth sign-in for a known email address and redeem the returned state through Magic Link without controlling the mailbox or completing the provider callback. The attacker can obtain a normal session for an existing user, or create an account incorrectly marked as email verified when sign-up is enabled. This issue is fixed in version 1.7.7.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-23 14:55 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | x_refsource_CONFIRM |
| https://github.com/better-auth/better-auth/pull/11494 | x_refsource_MISC |
| https://github.com/better-auth/better-auth/commit… | x_refsource_MISC |
| https://github.com/better-auth/better-auth/releas… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | better-auth |
Affected:
>= 1.4.0-beta.18, < 1.7.7
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CVE-2026-110864 (GCVE-0-2026-110864)
Vulnerability from cvelistv5 – Published: 2026-10-14 22:52 – Updated: 2026-10-15 15:36
VLAI
EPSS
VEX
Title
Better Auth 1.5.0-beta.12 before 1.7.7 Authentication Bypass via OAuth Proxy
Summary
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 can obtain encrypted state for a fake profile with a victim's verified email to take over the account via implicit linking.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 15:35 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | better-auth |
Affected:
1.5.0-beta.12 , < 1.7.7
(semver)
Unaffected: 1.7.7 (semver) cpe:2.3:a:better-auth:better_auth:*:*:*:*:*:*:*:* |
Date Public
2026-09-30 00:00
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CVE-2026-110863 (GCVE-0-2026-110863)
Vulnerability from cvelistv5 – Published: 2026-10-14 22:52 – Updated: 2026-10-16 17:14
VLAI
EPSS
VEX
Title
Better Auth @better-auth/sso before 1.7.3 Authentication Bypass via Personal SSO Providers
Summary
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Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 16:35 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | sso |
Affected:
1.7.0-rc.2 , < 1.7.3
(semver)
cpe:2.3:a:better-auth:better-auth\/sso:*:*:*:*:*:*:*:* |
Date Public
2026-09-29 00:00
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CVE-2026-110862 (GCVE-0-2026-110862)
Vulnerability from cvelistv5 – Published: 2026-10-14 22:52 – Updated: 2026-10-15 13:34
VLAI
EPSS
VEX
Title
Better Auth 1.4.0-beta.18 before 1.7.7 Authentication Bypass via Magic Link
Summary
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Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 13:33 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | better-auth |
Affected:
1.4.0-beta.18 , < 1.7.7
(semver)
Unaffected: 1.7.7 (semver) cpe:2.3:a:better-auth:better_auth:*:*:*:*:*:*:*:* |
Date Public
2026-09-30 00:00
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CVE-2026-110861 (GCVE-0-2026-110861)
Vulnerability from cvelistv5 – Published: 2026-10-14 22:52 – Updated: 2026-10-20 02:26
VLAI
EPSS
VEX
Title
Better Auth drizzle-adapter 1.6.17 before 1.7.7 Rate Limit Bypass via Race Condition
Summary
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 send bursts of concurrent requests that pass the check together, exceeding configured limits on password sign-in, two-factor verification, one-time code, password reset, and other rate-limited endpoints.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-20 02:26 UTC
CWE
- CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | drizzle-adapter |
Affected:
1.6.17 , < 1.7.7
(semver)
Unaffected: 1.7.7 (semver) |
|
| better-auth | kysely-adapter |
Affected:
1.6.17 , < 1.7.0
(semver)
Unaffected: 1.7.0 (semver) |
|
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Affected:
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(semver)
Unaffected: 1.7.7 (semver) |
Date Public
2026-09-30 00:00
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CVE-2026-109346 (GCVE-0-2026-109346)
Vulnerability from cvelistv5 – Published: 2026-10-12 16:05 – Updated: 2026-10-26 16:46
VLAI
EPSS
VEX
Title
better-auth 1.3.8-beta.3 before 1.7.0-rc.3 Device Authorization Phishing via /device
Summary
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 client_id and scope. Attackers can start a device request via /device/code, trick signed-in users into approving the code, then redeem it at /device/token for a live session token.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-26 16:35 UTC
CWE
- CWE-451 - User Interface (UI) Misrepresentation of Critical Information
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | better-auth |
Affected:
1.3.8-beta.3 , < 1.7.0-rc.3
(semver)
Unaffected: 1.7.0-rc.3 (semver) cpe:2.3:a:better-auth:better_auth:*:*:*:*:*:*:*:* |
Date Public
2026-09-28 00:00
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CVE-2026-80192 (GCVE-0-2026-80192)
Vulnerability from cvelistv5 – Published: 2026-08-25 23:19 – Updated: 2026-10-08 15:25
VLAI
EPSS
VEX
Title
better-auth SSO before 1.6.27 Domain Ownership Authentication Bypass
Summary
@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 organization owner/administrator to register an SSO provider for an arbitrary domain and have users with matching email domains added to the attacker's organization with default member permissions. When domain verification is enabled, a race condition between the verify-domain and update-provider endpoints can apply completed DNS proof to a different domain; combined with implicit account linking, this can link an attacker-controlled identity provider to an existing user account. Exploitation requires the SSO plugin (and, for the org-assignment path, the organization plugin) with the relevant configuration enabled.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 13:43 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | sso |
Affected:
1.4.8-beta.1 , < 1.4.8
(semver)
Unaffected: 1.4.8 (semver) |
|
| better-auth | sso |
Affected:
1.4.9 , < 1.6.27
(semver)
Unaffected: 1.6.27 (semver) |
|
| better-auth | sso |
Affected:
1.7.0-beta.0 , < 1.7.0-rc.5
(semver)
Unaffected: 1.7.0-rc.5 (semver) |
Date Public
2026-08-11 00:00
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CVE-2025-71401 (GCVE-0-2025-71401)
Vulnerability from cvelistv5 – Published: 2026-08-02 12:15 – Updated: 2026-08-03 14:29
VLAI
EPSS
VEX
Title
better-auth before 1.4.2 basePath Modification DoS
Summary
better-auth (npm) before 1.4.2 allows an external request to configure baseURL when it is not otherwise defined (e.g., BETTER_AUTH_URL is unset). An attacker able to make the very first request to the server after startup can poison the router's base path, causing all routes to return 404 for all users (denial of service). The issue is not reachable when baseURL is explicitly configured or on typical managed hosting platforms.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 14:29 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
2 references
| URL | Tags |
|---|---|
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Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | better-auth |
Affected:
0 , < 1.4.2
(semver)
Unaffected: 1.4.2 (semver) cpe:2.3:a:better-auth:better-auth\/oauth-provider:*:*:*:*:*:node.js:*:* |
Date Public
2025-11-27 00:00
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CVE-2025-71400 (GCVE-0-2025-71400)
Vulnerability from cvelistv5 – Published: 2026-08-02 12:15 – Updated: 2026-10-08 15:21
VLAI
EPSS
VEX
Title
better-auth passkey before 1.4.0 IDOR via delete-passkey
Summary
better-auth passkey versions before 1.4.0 contain an insecure direct object reference vulnerability in the passkey deletion endpoint that allows authenticated users to delete arbitrary passkeys by ID. Attackers with valid sessions can submit crafted requests to the delete-passkey endpoint with enumerated passkey IDs to remove other users' passkeys.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 14:46 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | passkey |
Affected:
0 , < 1.4.0
(semver)
Unaffected: 1.4.0 (semver) cpe:2.3:a:better-auth:better-auth\/oauth-provider:*:*:*:*:*:node.js:*:* |
Date Public
2025-11-24 00:00
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CVE-2025-71399 (GCVE-0-2025-71399)
Vulnerability from cvelistv5 – Published: 2026-08-02 12:15 – Updated: 2026-10-08 15:21
VLAI
EPSS
VEX
Title
Better Auth before 1.4.5 Path Normalization Bypass via rou3
Summary
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Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 15:48 UTC
CWE
- CWE-20 - Improper Input Validation
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://github.com/better-auth/better-auth/commit… | patch |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | better-auth |
Affected:
0 , < 1.4.5
(semver)
Unaffected: 1.4.5 (semver) cpe:2.3:a:better-auth:better-auth\/oauth-provider:*:*:*:*:*:node.js:*:* |
Date Public
2025-12-15 00:00
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