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TI-2018-10579 Aliases CVE-2018-14731GHSA-37q6-576q-vgr7

An issue was discovered in HMRServer.js in Parcel parcel-bundler.

Priority LOW 37CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and GitHub. Impact type from CWE-200.

Summary

An issue was discovered in HMRServer.js in Parcel parcel-bundler. Attackers are able to steal developer's code because the origin of requests is not checked by the WebSocket server, which is used for HMR (Hot Module Replacement). Anyone can receive the HMR message sent by the WebSocket server via a ws://127.0.0.1 connection (with a random TCP port number) from any origin. The random port number can be found by connecting to http://127.0.0.1 and reading the "new WebSocket" line in the source code.

Why it matters now

EPSS 0.02327 83rd percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Fixed parcel-bundler (npm): 1.10.0

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—parcel-bundler (npm)before 1.10.01.10.0Patch availableGHSA-37q6-576q-vgr7
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • parcel-bundler (npm) Vendor— Affected before 1.10.0 Fixed in 1.10.0 Patch available GHSA-37q6-576q-vgr7

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:parceljs:parcel:-:*:*:*:*:*:*:*not specified by NVDVulnerableParceljs
  • cpe:2.3:a:parceljs:parcel:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Parceljs

Remediation

  • Fix · GHSA-37q6-576q-vgr7 parcel-bundler (npm) Fixed in 1.10.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-14731
  2. 2026-10-03 Alias added: GHSA-37q6-576q-vgr7

References

Exploit 2

Advisory 3

Other 4

  • TI-2025-35389 npm parcel 2.0.0-alpha and before has an Origin Validation Error vulnerability. CVSS 3.1MEDIUM 6.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences