NextAuth.js provides authentication for Next.js. Prior to @auth/core 0.41.3 and next-auth 4.24.15 and 5.0.0-beta.32, the exported getToken() helper in the next-auth/jwt and @auth/core/jwt modules can throw an uncaught exception when it reads a malformed Authorization: Bearer header. When no session cookie is present, getToken() URL-decodes the bearer value before validating it, and malformed percent encoding causes decodeURIComponent() to throw instead of treating the token as invalid. Because getToken() is commonly called in API routes, middleware, and server-side request handlers, a single unauthenticated request can trigger an unhandled exception in code paths that authenticate requests, causing a per-request denial of service without exposing tokens, sessions, or other data and without bypassing authentication. This issue is fixed in @auth/core 0.41.3 and next-auth 4.24.15 and 5.0.0-beta.32.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - NextAuth.js provides authentication for Next.js. Prior to @auth/core 0.41.3 and next-auth 4.24.15 and
    5.0.0-beta.32, the exported getToken() helper in the next-auth/jwt and @auth/core/jwt modules can throw an
    uncaught exception when it reads a malformed Authorization: Bearer header. When no session cookie is
    present, getToken() URL-decodes the bearer value before validating it, and malformed percent encoding
    causes decodeURIComponent() to throw instead of treating the token as invalid. Because getToken() is
    commonly called in API routes, middleware, and server-side request handlers, a single unauthenticated
    request can trigger an unhandled exception in code paths that authenticate requests, causing a per-request
    denial of service without exposing tokens, sessions, or other data and without bypassing authentication.
    This issue is fixed in @auth/core 0.41.3 and next-auth 4.24.15 and 5.0.0-beta.32. (CVE-2026-73418)

ID	Name	Product	Family	Type	Severity
461440	Echo: next-auth: security update to 0.41.3	Tenable Cloud Security	Echo Local Security Checks	Local	high
461440	Echo: next-auth: security update to 0.41.3	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	high
445216	SCA: security update for @auth/core, next-auth (GHSA-xmf8-cvqr-rfgj)	Tenable Cloud Security	SCA Checks	Local	high
445216	SCA: security update for @auth/core, next-auth (GHSA-xmf8-cvqr-rfgj)	Tenable Self-Hosted Container Security	SCA Checks	Local	high

Detections

Analytics

CVE-2026-73418

high

Tenable Plugins

high

high

high

high