GHSA-8cw4-87c7-c6xx

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    GHSA-8cw4-87c7-c6xx

    Published: 8 Sept 2026Last Modified: 8 Sept 2026

    Summary: node-csv: Prototype replacement still reachable via columns path

    Details: ### Impact With columns: true and group_columns_by_name: true, a duplicated __proto__ header causes the duplicate-column branch to assign an array to obj['__proto__'], invoking the __proto__ setter and replacing the parsed record object's prototype with attacker-controlled data. Fixed in 7.0.2 (Object.hasOwn duplicate check + Object.defineProperty assignment). ### Patches The problem been patched. ### Workarounds Disable usage of both the columns and group_columns_by_name options. ### References issue #496, PR #497

    References: https://github.com/adaltas/node-csv/security/advisories/GHSA-8cw4-87c7-c6xx, https://nvd.nist.gov/vuln/detail/CVE-2026-85063, https://github.com/adaltas/node-csv/issues/496, https://github.com/adaltas/node-csv/pull/497, https://github.com/adaltas/node-csv/commit/eb4d1484589c976dcb977db8dd0b90e015a6f66e, https://github.com/adaltas/node-csv

    Affected packages

    Package

    Name: csv-parse

    Purl: pkg:npm/csv-parse

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -7.0.2

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High