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.
Advisories

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Fixes

Solution

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Workaround

No workaround given by the vendor.

History

Fri, 04 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 04 Sep 2026 15:45:00 +0000

Type Values Removed Values Added
First Time appeared Adaltas
Adaltas node-csv
Vendors & Products Adaltas
Adaltas node-csv

Fri, 04 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-915
References
Metrics threat_severity

None

cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L'}

threat_severity

Moderate


Thu, 03 Sep 2026 20:45:00 +0000

Type Values Removed Values Added
Description 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.
Title node-csv: Prototype replacement still reachable via columns path
Weaknesses CWE-1321
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-09-04T17:44:08.340Z

Reserved: 2026-09-02T21:21:01.774Z

Link: CVE-2026-85063

cve-icon Vulnrichment

Updated: 2026-09-04T17:44:03.567Z

cve-icon NVD

Status : Received

Published: 2026-09-03T21:17:23.620

Modified: 2026-09-04T18:18:02.050

Link: CVE-2026-85063

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-03T20:32:46Z

Links: CVE-2026-85063 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-04T15:22:12Z

Weaknesses