CVE-2025-56648

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

17/09/2025

Last modified:

18/09/2025

Description

npm parcel 2.0.0-alpha and before has an Origin Validation Error vulnerability. Malicious websites can send XMLHTTPRequests to the application&#39;s development server and read the response to steal source code when developers visit them.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N CVSS v3.1 Severity and Metrics:

Base Score: 6.50 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): None

Base Score 3.x

6.50

Severity 3.x

MEDIUM

References to Advisories, Solutions, and Tools

https://gist.github.com/R4356th/41f468def606b2406e36f7193f5322b8
https://github.com/parcel-bundler/parcel/discussions/10089
https://github.com/parcel-bundler/parcel/issues/10216