Description
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.
References (4)
Scores
CVSS v3
6.5
EPSS
0.0001
EPSS Percentile
0.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-346
Status
published
Products (3)
parcel/reporter-dev-server
1.6.1npm
parceljs/parcel
2.0.0 alpha0
parceljs/parcel
< 1.10.3
Published
Sep 17, 2025
Tracked Since
Feb 18, 2026