CVE-2025-56648
Parcel has an Origin Validation Error vulnerability
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
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.
- Record
CVE-2025-56648- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N - Weakness
- CWE-346
- Updated
- 2026-11-02
EUVDEUVD-2025-29779
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.
- Record
EUVD-2025-29779- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-qm9p-f9j5-w83w
Parcel has an Origin Validation Error vulnerability
parcel versions 1.6.1 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. Version 2.16.4 supports a --no-cors option which disables CORS headers in the dev server.
- Record
GHSA-qm9p-f9j5-w83w- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N - Weakness
- CWE-346
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2025-56648- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N - Weakness
- CWE-346
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2025-56648- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVGHSA-qm9p-f9j5-w83w
Parcel has an Origin Validation Error vulnerability
parcel versions 1.6.1 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. Version 2.16.4 supports a --no-cors option which disables CORS headers in the dev server.
- Record
GHSA-qm9p-f9j5-w83w- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N - Weakness
- CWE-346
- Updated
- 2026-11-02
OSVCLSA-2026-1793296891 No score
TuxCare security update for @parcel/reporter-dev-server (1 CVE)
TuxCare rebuilt @parcel/reporter-dev-server to address 1 CVE. Fixed in 2.8.3-tuxcare.1.
- Record
CLSA-2026-1793296891- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
@parcel/reporter-dev-servernpm |
1.6.1 to 2.16.3 | 2.16.4 |
@parcel/reporter-dev-serverTuxCare:npm |
2.8.3-tuxcare.0 up to 2.8.3-tuxcare.1, plus listed versions 2.8.3 |
2.8.3-tuxcare.1 |
@parcel/reporter-dev-servernpm |
1.6.1 up to 2.16.4 | 2.16.4 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-56648 is a medium vulnerability (CVSS 6.5) in Parceljs Parcel, published September 17, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.24%, the 14th percentile. Fixed in @parcel/reporter-dev-server 2.16.4.
References
gist.github.com/R4356th/41f468def606b2406e36f7193f5322b8
github.com/parcel-bundler/parcel/discussions/10089
nvd.nist.gov/vuln/detail/CVE-2025-56648