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CVE-2026-85063

CVE-2026-85063 · node-csv: Prototype replacement still reachable via columns path

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 6.9 · Medium · EPSS 0.6% · Fix available

Published
Updated

Stack: system · node

Affected products and versions

  • node-csv

    Versions
    • < 7.0.2: Affected

    No fix published

  • node-csv-parse Debian:14

    Versions
    • 6.0.0-1
    • 6.1.0-1
    Affected ranges
    • ECOSYSTEM: < 6.1.0-2

    Update to 6.1.0-2

  • csv-parse npm

    Affected ranges
    • SEMVER: < 7.0.2

    Update to 7.0.2

  • node-csv-parse Ubuntu:26.10

    Versions
    • 6.1.0-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-csv-parse Ubuntu:26.04:LTS

    Versions
    • 6.0.0-1
    • 6.1.0-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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