CVE-2026-85063

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/adaltas/node-csv/commit/eb4d1484589c976dcb977db8dd0b90e015a6f66e
https://github.com/adaltas/node-csv/issues/496
https://github.com/adaltas/node-csv/pull/497
https://github.com/adaltas/node-csv/security/advisories/GHSA-8cw4-87c7-c6xx
https://github.com/adaltas/node-csv/issues/496

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-03 21:17

Updated : 2026-09-09 21:09

NVD link : CVE-2026-85063

Mitre link : CVE-2026-85063

CVE.ORG link : CVE-2026-85063

JSON object : View

Products Affected

No product.

CWE

CWE-1321

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

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