CVE Catalog

CVE-2026-85063

MediumCVSS 6.9
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.33%

25th percentile - higher than 25% of all known CVEs

Summary

node-csv is a full-featured CSV parser that prior to 7.0.2, when the columns and group_columns_by_name options are enabled, treats a duplicate __proto__ header as an existing property, assigns an attacker-controlled array through obj['__proto__'], and replaces the parsed record object's prototype. A malicious CSV header can inject inherited array values into the returned record, hide those values from JSON serialization, and affect property enumeration and type or shape checks.

Risk Assessment

An attacker can manipulate data processed by the application, potentially leading to data integrity issues, bypass of security controls, or unexpected application behavior.

Recommendation

It is recommended to update node-csv to version 7.0.2 or later, which includes the fix.

Related vulnerabilities

Original NVD description (English source)

node-csv is a full-featured CSV parser with a simple API that is tested against large datasets. Prior to 7.0.2, csv-parse with the columns and group_columns_by_name options enabled treats a duplicate __proto__ header as an existing property in packages/csv-parse/lib/api/index.js, assigns an attacker-controlled array through obj['__proto__'], and replaces the parsed record object's prototype. A malicious CSV header can therefore inject inherited array values into the returned record, hide those inherited values from JSON serialization, and affect property enumeration and type or shape checks in applications that process the record. This issue is fixed in version 7.0.2.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS