adaltas node-csv up to 7.0.1 CSV Parser index.js injection

Summaryinfo

A vulnerability described as critical has been identified in adaltas node-csv up to 7.0.1. Affected is an unknown function of the file packages/csv-parse/lib/api/index.js of the component CSV Parser. Such manipulation leads to injection. This vulnerability is documented as CVE-2026-85063. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in adaltas node-csv up to 7.0.1 and classified as critical. Affected by this issue is an unknown code block of the file packages/csv-parse/lib/api/index.js of the component CSV Parser. The manipulation with an unknown input leads to a injection vulnerability. Using CWE to declare the problem leads to CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-85063 since 09/02/2026. The exploitation is known to be easy. The attack may be launched remotely. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1055 by the MITRE ATT&CK project.

Upgrading to version 7.0.2 eliminates this vulnerability.

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Productinfo

Vendor

• adaltas

Name

• node-csv

Version

• 7.0.0
• 7.0.1

Website

• Product: https://github.com/adaltas/node-csv/

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