Skip to content

Parcel has an Origin Validation Error vulnerability

Moderate severity GitHub Reviewed Published Sep 17, 2025 to the GitHub Advisory Database • Updated Oct 29, 2025

Package

npm @parcel/reporter-dev-server (npm)

Affected versions

>= 1.6.0, <= 2.16.0

Patched versions

None

Description

parcel versions 1.6.0 and above have 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

Published by the National Vulnerability Database Sep 17, 2025
Published to the GitHub Advisory Database Sep 17, 2025
Reviewed Sep 18, 2025
Last updated Oct 29, 2025

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(4th percentile)

Weaknesses

Origin Validation Error

The product does not properly verify that the source of data or communication is valid. Learn more on MITRE.

CVE ID

CVE-2025-56648

GHSA ID

GHSA-qm9p-f9j5-w83w

Source code

Credits

Loading Checking history
See something to contribute? Suggest improvements for this vulnerability.