CVE-2025-56648

Name: CVE-2025-56648
Creator: NVD / NIST
Published: 2025-09-17T19:15:46.963+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.22%

Last modified Jun 17, 2026

CVE-2025-56648 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 0.22% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

EPSS Probability

0.22%

12.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-346

Affected Software

Vendor	Product	Versions	Update
Parceljs	Parcel	<= 1.10.3	—
Parceljs	Parcel	2.0.0	Alpha0

References

https://gist.github.com/R4356th/41f468def606b2406e36f7193f5322b8Exploit
https://github.com/parcel-bundler/parcel/commit/4bc56e3242a85491c7edf589966e9b44c6330c49
https://github.com/parcel-bundler/parcel/discussions/10089Issue Tracking
https://github.com/parcel-bundler/parcel/issues/10216Exploit, Issue Tracking

Timeline

Published: Sep 17, 2025
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2025-56648?

How severe is CVE-2025-56648?

CVE-2025-56648 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.22% probability of exploitation in the next 30 days.

How do I fix CVE-2025-56648?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-56648?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST