---
id: CVE-2026-85063
title: >-
  node-csv is a full-featured CSV parser with a simple API that is tested
  against large datasets
summary: >-
  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 prope…
severity: medium
cwe:
  - CWE-1321
  - CWE-915
vendor: csv-parse
product: csv-parse
affected:
  - csv-parse < 7.0.2
patched:
  - csv-parse 7.0.2
published: '2026-09-03'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:09:13.080'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85063'
references:
  - url: >-
      https://github.com/adaltas/node-csv/commit/eb4d1484589c976dcb977db8dd0b90e015a6f66e
    label: security-advisories@github.com
  - url: 'https://github.com/adaltas/node-csv/issues/496'
    label: security-advisories@github.com
  - url: 'https://github.com/adaltas/node-csv/pull/497'
    label: security-advisories@github.com
  - url: >-
      https://github.com/adaltas/node-csv/security/advisories/GHSA-8cw4-87c7-c6xx
    label: security-advisories@github.com
  - url: 'https://github.com/adaltas/node-csv/issues/496'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85063'
  - url: 'https://github.com/advisories/GHSA-8cw4-87c7-c6xx'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-85063.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-85063'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2528257'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-85063'
tags:
  - nvd
  - ghsa
  - npm
  - csaf
  - vex
  - red-hat
epss: 0.00566
epssPercentile: 0.44622
aliases:
  - GHSA-8cw4-87c7-c6xx
ecosystem: npm
ingestedAt: '2026-09-08T19:08:49.635Z'
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L'
cvssSource: vendor
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-85063)

Affected packages:

- `csv-parse < 7.0.2`

Patched in:

- `csv-parse 7.0.2`

Source: https://github.com/advisories/GHSA-8cw4-87c7-c6xx

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Fuse 7, Self-service automation portal 2 · no fix planned: Red Hat Fuse 7, Self-service automation portal 2 · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-85063.json)