CVE-2026-73421

Published: Ago 14, 2026 Last Modified: Ago 14, 2026
ExploitDB:
Other exploit source:
Google Dorks:
CRITICAL 9,1
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A

Description

AI Translation Available

NextAuth.js provides authentication for Next.js. From next-auth 5.0.0-beta.0 until 5.0.0-beta.32, applications that gate access by checking only for the existence of the auth object returned by the auth() wrapper can fail open when Auth.js has a server configuration error. In middleware, Route Handlers, React Server Components, and other auth() entry points, a non-OK session response is parsed into a truthy error object instead of null, so checks such as !!auth and if (req.auth) evaluate to true for unauthenticated requests. A provider missing both the issuer and authorization endpoint triggers InvalidEndpoints, and an unset AUTH_SECRET or another server configuration error can produce the same behavior. There is no impact while configuration is valid, but after a deployment becomes misconfigured, routes protected only by session existence silently grant access to every visitor. This issue is fixed in next-auth 5.0.0-beta.32.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0064
Percentile
0,5th
Updated

Single Data Point

Only one EPSS measurement is available for this CVE. Trend analysis requires multiple data points over time.

285

Improper Authorization

Draft
Abstraction: Class Structure: Simple
Common Consequences
Security Scopes Affected:
Confidentiality Integrity Access Control
Potential Impacts:
Read Application Data Read Files Or Directories Modify Application Data Modify Files Or Directories Gain Privileges Or Assume Identity Execute Unauthorized Code Or Commands
Applicable Platforms
Technologies: Not Technology-Specific, Web Server, Database Server
Likelihood of Exploit: High
View CWE Details
636

Not Failing Securely ('Failing Open')

Draft
Abstraction: Class Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control
Potential Impacts:
Bypass Protection Mechanism
Applicable Platforms
Technologies: Not Technology-Specific, ICS/OT
View CWE Details
https://github.com/nextauthjs/next-auth/commit/d008b9b764bf…
https://github.com/nextauthjs/next-auth/commit/d008b9b764bf4b322a87e1822d1dda77…
https://github.com/nextauthjs/next-auth/releases/tag/next-a…
https://github.com/nextauthjs/next-auth/releases/tag/[email protected]
https://github.com/nextauthjs/next-auth/security/advisories…
https://github.com/nextauthjs/next-auth/security/advisories/GHSA-8fpg-xm3f-6cx3