CVE-2026-53517

Better 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 refreshtoken grant performs a non-atomic read, validate, revoke, and mint sequence on the oauthRefreshToken row, allowing...

CVE-2026-53518

Better 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 authorizationcode grant redeems a single-use authorization code through a non-atomic find-then-delete sequence, allowing two...

CVE-2026-53517

Better 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 refreshtoken grant performs a non-atomic read, validate, revoke, and mint sequence on the oauthRefreshToken row, allowing...

EUVD-2026-44745

Better 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 refreshtoken grant performs a non-atomic read, validate, revoke, and mint sequence on the oauthRefreshToken row, allowing...

CVE-2026-53518 Better Auth OAuth Provider: Race Condition in Authorization Code Exchange Enables Multi-Use Code Redemption

Better 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 authorizationcode grant redeems a single-use authorization code through a non-atomic find-then-delete sequence, allowing two...

CVE-2026-53518

CVE-2026-53518 affects the Better Auth ecosystem, specifically the @better-auth/oauth-provider token endpoint for the authorization_code grant (and legacy paths via oidc-provider/mcp plugins). A race condition arises from a non-atomic find-then-delete when redeeming a single-use authorization cod...

PYSEC-2026-2449 Django has a Race Condition vulnerability

An issue was discovered in 6.0 before 6.0.3, 5.2 before 5.2.12, and 4.2 before 4.2.29. Race condition in file-system storage and file-based cache backends in Django allows an attacker to cause file system objects to be created with incorrect permissions via concurrent requests, where one thread's...

@better-auth/oauth-provider's OAuth authorization-code grant allows concurrent redemption when two token requests race the find-then-delete primitive

Am I affected? Users are affected if all of the following are true: - Their project depends on @better-auth/oauth-provider at a version = 1.6.0, = 1.4.8-beta.7, 1.6.0, or enables the legacy oidc-provider or mcp plugins from better-auth/plugins. - Their application exposes /api/auth/oauth2/token o...

H2O Vulnerable to Denial of Service (DoS) via `/3/Parse` Endpoint

A vulnerability in the /3/Parse endpoint of h2oai/h2o-3 version 3.46.0.1 allows for a denial of service DoS attack. The endpoint uses a user-specified string to construct a regular expression, which is then applied to another user-specified string. By sending multiple simultaneous requests, an...

PYSEC-2026-1445 H2O Vulnerable to Denial of Service (DoS) via `/3/Parse` Endpoint

A vulnerability in the /3/Parse endpoint of h2oai/h2o-3 version 3.46.0.1 allows for a denial of service DoS attack. The endpoint uses a user-specified string to construct a regular expression, which is then applied to another user-specified string. By sending multiple simultaneous requests, an...

PT-2026-56301

Name of the Vulnerable Software and Affected Versions @better-auth/oauth-provider versions 1.6.0 through 1.6.10 better-auth versions 1.4.8-beta.7 through 1.5.x Description The @better-auth/oauth-provider POST /oauth2/token endpoint is susceptible to a race condition during the refresh token grant...

Race Condition

Overview Affected versions of this package are vulnerable to Race Condition through the ShareHandler process. An attacker can bypass intended download limits by making concurrent requests with the same share token, allowing multiple unauthorized downloads beyond the configured cap. Remediation...

Race Condition

Overview Affected versions of this package are vulnerable to Race Condition through the ShareHandler process. An attacker can bypass intended download limits by making concurrent requests with the same share token, allowing multiple unauthorized downloads beyond the configured cap. Remediation...

Race Condition

Overview Affected versions of this package are vulnerable to Race Condition through the ShareHandler process. An attacker can bypass intended download limits by making concurrent requests with the same share token, allowing multiple unauthorized downloads beyond the configured cap. Remediation...

CVE-2026-47386

NocoDB is software for building databases as spreadsheets. Prior to 2026.05.1, two concurrent token-exchange requests using the same OAuth authorization code could each mint a distinct valid accesstoken, refreshtoken pair, breaking the single-use guarantee that PKCE relies on. This vulnerability ...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization in the permission evaluation process under concurrent requests involving both CheckPermission/CheckBulkPermissions and LookupResources with a context parameter, when the dispatch result cache is enabled. An...

Race Condition

Overview Affected versions of this package are vulnerable to Race Condition through unsynchronized concurrent access to the InMemorySecret2FA map. An attacker can cause the process to crash by sending multiple simultaneous HTTP requests that trigger concurrent reads and writes to the shared map...

CVE-2026-50631

CVE-2026-50631 : A TOCTOU race condition in Apache CXF's AbstractOAuthDataProvider allows concurrent requests to reuse the same Refresh Token when recycleRefreshTokens is false, bypassing single-use semantics and generating multiple valid Access Tokens. This can enable token replay/abuse by multi...

EUVD-2026-36399

A race condition in AbstractOAuthDataProvider allows concurrent requests using the same Refresh Token to bypass single-use semantics and generate multiple valid Access Tokens, when 'recycleRefreshTokens' is set to false. A leaked refresh token can be replayed concurrently by multiple attackers or...

Omni has a TOCTOU race condition that allows multiple concurrent uses of a single-use SAML session token

Summary SAML.getSession internal/pkg/auth/interceptor/saml.go checks the Used flag on a SAMLAssertion resource and then marks it used in two separate state operations. Because the check and the update are not atomic, concurrent requests carrying the same saml-session token can both observe Used =...