What’s Vulnerable › Vulnerabilities

CVE-2025-56648

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-09-17 · updated 2026-06-17
• Weakness: CWE-346

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.

Affected products

• Parceljs Parcel: through 1.10.3; 2.0.0-alpha0

References

• https://gist.github.com/R4356th/41f468def606b2406e36f7193f5322b8
• https://github.com/parcel-bundler/parcel/commit/4bc56e3242a85491c7edf589966e9b44c6330c49
• https://github.com/parcel-bundler/parcel/discussions/10089
• https://github.com/parcel-bundler/parcel/issues/10216

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