CVE-2025-56648
September 17, 2025
npm parcel 2.0.0-alpha and before has an Origin Validation Error vulnerability. Malicious websites can send XMLHTTPRequests to the application's development server and read the response to steal source code when developers visit them.
Affected Packages
https://github.com/parcel-bundler/parcel.git (GITHUB):
Affected version(s) >=v1.6.1 <v2.16.4Fix Suggestion:
Update to version v2.16.4@parcel/reporter-dev-server (NPM):
Affected version(s) >=2.0.0-alpha.1 <2.16.4Fix Suggestion:
Update to version 2.16.4Related Resources (7)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Origin Validation Error
EPSS
Base Score:
0.02
