CVE-2026-107721

Published: Ott 09, 2026 Last Modified: Ott 09, 2026

ExploitDB:

Other exploit source:

Google Dorks:

MEDIUM 5,9

Source: [email protected]

Attack Vector: network

Attack Complexity: high

Privileges Required: high

User Interaction: none

Scope: unchanged

Confidentiality: high

Integrity: high

Availability: none

Description

AI Translation Available

fast-jwt provides fast JSON Web Token (JWT) implementation. Prior to 6.3.0, fast-jwt createVerifier accepts Infinity for clockTolerance because its option validation checks type and negativity but not finiteness. In validateClaimDateValue, infinite positive and negative modifiers make exp and nbf comparisons always pass, allowing expired or not-yet-active tokens to be accepted. The verifier cache also derives infinite bounds, so entries created under this configuration can remain valid until eviction. Exploitation requires an application administrator or equivalent configuration path to set clockTolerance to Infinity. This issue is fixed in version 6.3.0.

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

0,0033

Percentile

0,2th

Updated

EPSS Score Trend (Last 3 Days)

613

Insufficient Session Expiration

Incomplete

Abstraction: Base Structure: Simple

Common Consequences

Security Scopes Affected:

Access Control

Potential Impacts:

Bypass Protection Mechanism

Applicable Platforms

Technologies: Web Based, Web Server

View CWE Details

682

Incorrect Calculation

Draft

Abstraction: Pillar Structure: Simple

Common Consequences

Security Scopes Affected:

Availability Integrity Confidentiality Access Control

Potential Impacts:

Dos: Crash, Exit, Or Restart Dos: Resource Consumption (Other) Execute Unauthorized Code Or Commands Gain Privileges Or Assume Identity Bypass Protection Mechanism