npm parcel 2.0.0-alpha and before has an Origin Validation Error vulnerability.
Priority MEDIUM 62CWE-346Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Partial Red Hat: 2 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-346.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00236 14th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Partial @parcel/reporter-dev-server (npm): 2.16.4Red Hat: 2 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | @parcel/reporter-dev-server (npm) | 1.6.1 to before 2.16.4 | 2.16.4 | Patch available | GHSA-qm9p-f9j5-w83w |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- @parcel/reporter-dev-server (npm) Vendor— Affected 1.6.1 to before 2.16.4 Fixed in 2.16.4 Patch available GHSA-qm9p-f9j5-w83w
Remediation
- Fix · GHSA-qm9p-f9j5-w83w @parcel/reporter-dev-server (npm) Fixed in 2.16.4 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Not affected: 2 products
- Red Hat JBoss Enterprise Application Platform 8
- Red Hat JBoss Enterprise Application Platform Expansion Pack
Timeline
- 2026-10-02 Threatist record created from CVE-2025-56648
- 2026-10-03 Alias added: GHSA-qm9p-f9j5-w83w
References
Exploit 2
Other 5
- https://github.com/parcel-bundler/parcel/discussions/10089
- https://github.com/parcel-bundler/parcel/commit/4bc56e3242a85491c7edf589966e9b44c6330c49
- https://github.com/parcel-bundler/parcel/pull/10138
- https://github.com/parcel-bundler/parcel/commit/9e2f6f1377123cff3b82f6dde4e20336efc846a1
- https://github.com/parcel-bundler/parcel
More Parceljs Parcel vulnerabilities
- TI-2018-10579 An issue was discovered in HMRServer.js in Parcel parcel-bundler. CVSS 3.0HIGH 7.5
Sources
- CVE-2025-56648 · CVE Program
- CVE-2025-56648 · NVD
- FIRST EPSS
- GHSA-qm9p-f9j5-w83w · GitHub Advisory Database · CC BY 4.0
- CVE-2025-56648 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences